There are still a lot of hidden details being revealed in Apple’s upcoming iPhone OS 4.0, and some of them might including deeper integration of Facebook. In particular, there seems to be evidence that Facebook events, contacts and possibly email will be handled at the iPhone User Accounts level.
Engadget dug through some some of the .plist code files from a jailbroken iPhone running OS 4.0 and found several supporting details including mention of “SocialKitInternal.framework,” which, as they mention, could allow other service integration. Facebook events could be integrated with Apple calendars, and there seems to be support for mail. Given that Facebook is working on its own real email client, Titan, it would also make sense for the iPhone OS to prep for that, though there is already enough Facebook user account data to warrant being integrated with Apple User Accounts, as Gunning For Safety says (yes, a nail gun safety blog).
What I’m really looking forward to is Apple’s social cover flow patent to be integrated with Facebook for browsing profiles. If OS 4.0 or an upcoming version of it supports the newly-granted social cover flow feature and it’s opened up to developers, then surely it’ll get integrated into Facebook and other social media apps on the iPhone. Thankfully, OS 4.0 for the iPhone and iPod Touch comes out this summer. iPad users will have to wait until fall.