http://www.macrumors.com/iphone/2009/03/04/paid-version-of-aim-for-iphone-now-available-for-2-99/

Last week, we reported on an update to AOL's AIM for iPhone, which brings several new features to the instant messaging application. At press time, only an ad-supported, free version [App Store] was available, although an ad-free, paid version was promised to be working its way through Apple's App Store approval process.

AOL has informed us that the paid version [App Store] is now available with a price tag of $2.99. Other than the removal of ads and a purple icon (versus a red icon for the free version), the paid version offers the same features present in the free version.