The soon to be released Apple iOS 5 would be a fall entrant, and it appears it has worked on integrating Twitter, but not Facebook. Boasting of close to 700 million global users, Facebook integration certainly would be beneficial but it has been sidelined at present. The most obvious reason points to the inability of both big players reaching an agreement because this teaming up isn’t just limited to analysis of API’s.
Apple is excited about the new iCloud which could very well debut close to the iOS 5 and iPhone. iCloud can’t be broadly termed as just an online storage service. In fact, it’s more essentially a synchronization service as iCloud is intended to add Apple customers better manage content on Mac OS X and iOS devices. Apple aims at pushing users' content to the device and Facebook works to pull content to the cloud. This pull and push difference is fundamental and chalks out separate paths.
Facebook looks at retaining customers by keeping them bonded with friends and family, whereas Apple looks at convenient and free flow of content on devices operating on their OS to attract customers.