Unified profiles

1. A system, comprising:

a first computer, the first computer including a user interface to allow a user to access an online service provided by an online service provider and to provide user information;

a storage in which to store the user information; and

a processor executing instructions that cause the processor to:

receive the user information through the user interface and extract a base identifier from the user information received through user interface;

access the storage to determine if the user information received through the user interface exists in the storage, and to retrieve a base identifier from the user information in the storage when the user information exists in the storage;

compare the user information, other than the base identifier, in the storage to determine if the user information in storage matches the user information received through the user interface;

reconciling the user information received through the user interface as a first version of the user information for the user and user information in storage for a same user identified by the base identifier as a second version of user information for the same user; and

if the user information from the user interface does not match the user information in the storage, notifying the user through the interface.

2. The system of claim 1 , wherein the instructions cause the processor to:

receive updated information from the user; and

store the updated information in the storage with the base identifier.

3. A computer-controlled method, comprising:

receiving user information through a user interface, wherein the user information received through the user interface includes a base identifier;

accessing a storage to determine if the user information including the base identifier exists in the storage;

comparing the user information, other than the base identifier, in the storage to the user information received through the user interface;

reconciling the user information in the storage as a first version of the user information and the user information received through the user interface as a second version of user information for a same user identified by the base identifier; and

notifying the user if the user information does not match.

4. The computer-controlled method of claim 3 , further comprising storing the user information when it does not exist in the storage.

5. The computer-controlled method of claim 3 , further comprising:

receiving updated user information through the user interface; and

storing the updated user information.

6. The computer-controlled method of claim 3 , wherein the base identifier comprises at least one of a user name, an email address, a user number, and a system identifier.