Location-based and group-based operations on a data processing device

1. A computer-implemented method comprising:

establishing a group containing identities of users in the group and notification data indicating when wireless data processing devices corresponding to the users in the group are to be notified regarding current locations of the wireless data processing devices corresponding to the users in the group, the group dynamically established based on contents of each of the wireless data processing devices, the contents comprising different buddy lists on each of the wireless data processing devices that each list each of the other users in the group in the buddy list;

determining whether the wireless data processing devices corresponding to two or more of the users in the group are at a same location or within a particular distance of the same location;

identifying the two or more users and the same location; and

notifying the users in the group of an identity of the two or more users and the same location.

2. The method of claim 1 wherein determining comprises receiving location data from the wireless data processing devices and comparing the location data to determine whether the wireless data processing devices corresponding to the two or more users are at the same location or within a particular distance of the same location.

3. The method of claim 2 wherein the location data comprises global positioning system (GPS) data.

4. The method of claim 2 wherein the location data comprises cell tower identification data identifying one or more current cell towers with which at least one of the wireless data processing devices are communicating.

5. The method of claim 1 further comprising:

providing a specified visual or audible notification when two or more of the wireless data processing devices corresponding to the users in the group are determined to be at the same location or within a particular distance of the same location.

6. The method of claim 1 wherein identifying the same location comprises searching a location database using location data received from the wireless data processing devices, the location database containing an association between known locations and named points of interest.

7. The method of claim 6 further comprising:

retrieving a name associated with one of the points of interest; and

transmitting the name to the wireless data processing devices corresponding to the users.

8. A system comprising at least one memory for storing program code and at least one processor for processing the program code to perform the operations of:

establishing a group containing identities of users in the group and notification data indicating when wireless data processing devices corresponding to the users in the group are to be notified regarding current locations of the wireless data processing devices corresponding to the users in the group, the group dynamically established based on contents of each of the wireless data processing devices, the contents comprising different buddy lists on each of the wireless data processing devices that each list each of the other users in the group in the buddy list;

determining whether the wireless data processing devices corresponding to two or more of the users in the group are at a same location or within a particular distance of the same location;

identifying the two or more users and the same location; and

notifying the users in the group of an identity of the two or more users and the same location.

9. The system of claim 8 wherein determining comprises receiving location data from the wireless data processing devices and comparing the location data to determine whether the wireless data processing devices corresponding to the two or more users are at the same location or within a particular distance of the same location.

10. The system of claim 8 wherein the location data comprises global positioning system (GPS) data.

11. The system of claim 9 wherein the location data comprises cell tower identification data identifying one or more current cell towers with which at least one of the wireless data processing devices are communicating.

12. The system of claim 8 comprising additional code to cause the processor to perform the operation of:

providing a specified visual or audible notification when two or more of the wireless data processing devices corresponding to the users in the group are determined to be at the same location or within a particular distance of the same location.

13. The system of claim 8 wherein identifying the same location comprises searching a location database using location data received from the wireless data processing devices, the location database containing an association between known locations and named points of interest.

14. The system of claim 13 comprising additional code to cause the processor to perform the operations of:

retrieving a name associated with one of the points of interest; and

transmitting the name to the wireless data processing devices corresponding to the users.

15. A machine-readable device having program code stored thereon which, when executed by a machine, causes the machine to perform the operations of:

establishing a group containing identities of users in the group and notification data indicating when wireless data processing devices corresponding to the users in the group are to be notified regarding current locations of the wireless data processing devices corresponding to the users in the group, the group dynamically established based on contents of each of the wireless data processing devices, the contents comprising different buddy lists on each of the wireless data processing devices that each list each of the other users in the group in the buddy list;

determining whether the wireless data processing devices corresponding to two or more of the users in the group are at a same location or within a particular distance of the same location;

identifying the two or more users and the same location; and

notifying the users in the group of an identity of the two or more users and the same location.

16. The machine-readable device of claim 15 wherein determining comprises receiving location data from the wireless data processing devices and comparing the location data to determine whether the wireless data processing devices corresponding to the two or more users are at the same location or within a particular distance of the same location.

17. The machine-readable device of claim 16 wherein the location data comprises global positioning machine-readable medium (GPS) data.

18. The machine-readable device of claim 16 wherein the location data comprises cell tower identification data identifying one or more current cell towers with which at least one of the wireless data processing devices are communicating.

19. The machine-readable device of claim 15 comprising additional code to cause the machine to perform the operation of:

providing a specified visual or audible notification when two or more of the wireless data processing devices corresponding to the users in the group are determined to be at the same location or within a particular distance of the same location.

20. The machine-readable device of claim 15 wherein identifying the same location comprises searching a location database using location data received from the wireless data processing devices, the location database containing an association between known locations and named points of interest.

21. The machine-readable device of claim 20 comprising additional code to cause the machine to perform the operations of:

retrieving a name associated with one of the points of interest; and

transmitting the name to the wireless data processing devices corresponding to the users.