Managing forwarded electronic messages

1. A computer-implemented method comprising:

receiving an original message having an original source indicator and an intended destination indicator identified by a sender of the original message;

sending a mobile device communication based on the original message to a first destination indicator of a mobile device associated with the intended destination indicator, wherein the first destination indicator is different from the intended destination indicator;

receiving, from the mobile device, a reply message to the original message with the reply message having a first reply source indicator that is different from the intended destination indicator identified by the sender of the original message, wherein the first reply source indicator is the same as the first destination indicator;

receiving, from the mobile device, an indication of whether to hide the first reply source indicator;

if the indication indicates to hide the first reply source indicator, sending a communication based on the reply message to the original source indicator, with the communication having a second reply source indicator that is the same as the intended destination indicator identified by the sender of the original message; and

if the indication does not indicate to hide the first reply source indicator, sending a communication based on the reply message to the original source indicator, with the communication having the first reply source indicator that is different from the intended destination indicator.

2. The method of claim 1 , wherein if the indication indicates to hide the first reply source indicator, sending the communication based on the reply message to the original source indicator comprises replacing the first reply source indicator in the reply message with the intended destination indicator.

3. The method of claim 1 , wherein if the indication does not indicate to hide the first reply source indicator, replacing the sender address of the reply message with the destination address specified in the original message.

4. The method of claim 1 , wherein the indication of whether to hide the first reply source indicator is based on input entered by a sender of the reply message at the mobile device.

5. The method of claim 1 , further comprising enabling the display of the communication based on the reply message.

6. The method of claim 1 , further comprising storing message session information based on the mobile device communication sent to the mobile device.

7. The method of claim 1 , wherein the original source indicator comprises at least one of a screen name, a mobile telephone number, or a text message address.

8. The method of claim 1 , wherein the original source indicator is associated with the sender having multiple identities within a communication service, the method further comprising creating an association between a primary identity associated with the sender and a second identity associated with the sender and wherein:

receiving the original message having the original source indicator and the intended destination indicator identified by the sender of the original message comprises receiving an original message having an original source indicator that identifies the primary identity, and an intended destination indicator identified by the sender of the original message when the sender is signed on to the communication service as the second identity.

9. The method of claim 1 , wherein:

the original source indicator comprises a screen name for an instant message entity sending the original message;

the intended destination indicator comprises a screen name for an instant message entity who is an intended recipient of the original message;

the first reply destination indicator and the first reply source indicator of the received reply message comprises a mobile telephone number of the mobile device; and

the second reply source indicator of the communication based on the reply message comprises the screen name for the instant message entity who is the intended recipient of the original message.

10. The computer-implemented method of claim 1 , further comprising:

receiving, by way of a graphical user interface from a recipient of the original message, an indication of one or more user-defined preferences for forwarding instant messages; and

sending the mobile device communication in accordance with the user-defined preferences for forwarding instant messages.

11. The computer-implemented method of claim 10 , further comprising sending the communication based on the reply message in accordance with the user-defined preferences for forwarding instant messages.

12. The computer-implemented method of claim 1 , wherein the mobile device is associated with an intended recipient of the original message.

13. The computer-implemented method of claim 1 , further comprising sending, to the mobile device, a prompt for a mobile device user associated with the mobile device to indicate whether to hide the first reply source indicator.

14. The computer-implemented method of claim 1 , wherein the indication indicating whether to hide the first reply source indicator is based on a user preference of a mobile device user stored on the mobile device.

15. A computer-implemented method comprising:

receiving an original message from a sending mobile telephone device associated with a sender having an original source indicator and an intended destination indicator identified by the sender of the original message;

forwarding the original message to a first destination indicator telephone number of a mobile device associated with the intended destination indicator;

receiving, from the mobile device, a reply message to the original message with the reply message having a first reply source indicator telephone number that is different from the intended destination indicator identified by the sender of the original message;

receiving, from the mobile device, an indication of whether to hide the first reply source indicator telephone number; if the indication indicates to hide the first reply source indicator telephone number, sending, to the original source indicator, a communication based on the reply message with the communication having a second reply source indicator that is the same as the intended destination indicator identified by the sender of the original message; and

if the indication does not indicate to hide the first reply source indicator, sending a communication based on the reply message to the original source indicator, with the communication having the first reply source indicator telephone number that is different from the intended destination indicator.

16. A tangible, non-transitory computer storage medium containing instructions that, when executed by a computer, generate a graphical user interface for display on a display device, the graphical user interface comprising:

a list of potential message recipients selected by a user as significant to the user wherein:

a mobile device identifier is associated with at least one of the listed potential message recipients, and

a user account identifier is associated with one or more of the listed potential message recipients; and

an instant message display for a reply message received in reply to an original message sent to a destination address of one of the listed potential message recipients, wherein the reply message is received from the intended recipient of the original message, and wherein:

the instant message display includes a sender address of the recipient, wherein the sender address of the recipient is hidden if the recipient indicates to hide the sender address of the recipient when the sender address is different from the destination address specified in the original message and the sender address is not hidden if the recipient does not indicate to hide the sender address of the recipient when the sender address is different from the destination address specified in the original message, the reply message being sent from a mobile device associated with the intended recipient and the sender address of the reply message being replaced by a mobile device identifier corresponding to the destination address specified in the original message.

17. The computer storage medium of claim 16 , wherein:

the computer service includes an instant messaging computer service; and

the list reflects presence information for each of the listed potential message recipients identified by the user account identifier.

18. The computer storage medium of claim 16 , wherein if the recipient indication does not indicate to hide the first reply source indicator, the sender address of the reply message is replaced with the destination address specified in the original message.

19. The computer storage medium of claim 18 , wherein the sender address of the reply message is replaced with the destination address specified in the original message only if the sender address is different from the destination address specified in the original message.

20. The computer storage medium of claim 16 , wherein:

the sender address of the reply message is replaced by a user account identifier corresponding to the destination address specified in the original message when the recipient indicates to hide the sender address of the recipient in the reply message.