Facebook are planning a redesign of user profiles this spring, aiming to make the profiles simpler and more relevant while giving a greater degree of control to the users.

Facebook Developers | Facebook Developers News via kwout
The draft design uses a tabbed layout for the wide column with the initial set of tabs for a Wall, an About page and Photos. Applications can also be set up in custom tabs, but these are configured and controlled by the user.
The design changes are intended to “align the goals of application developers with the principles of the Platform ecosystem”. This, combined with the earlier introduction of “allocations” to ration the features available to unruly applications illustrate Facebook’s strategy of ecological platform development; changing an environment in which desirable behaviours are easier and more profitable than undesirable ones.
