Preview at WWDC likely in June, followed by September launch.
iOS 5 to Include Twitter Integration? [Updated]
TechCrunch reports that Apple will be integrating Twitter photo sharing directly into iOS 5:
We've heard from multiple sources that Twitter is likely to have a big-time partner for such a service: Apple. Specifically, we're hearing that Apple's new iOS 5 will come with an option to share images to Twitter baked into the OS. This would be similar to the way you can currently share videos on YouTube with one click in iOS. Obviously, a user would have to enable this feature by logging in with their Twitter credentials in iOS. There would then be a "Send to Twitter" option for pictures stored on your device.Twitter is said to be offering their own photo-sharing service in the near future. Apple will be detailing iOS 5 during WWDC next week.
DaringFireball's John Gruber adds some comments suggesting that Twitter integration is indeed in iOS 5 and that there is more to it than just photo integration:
So close to the bigger story, but yet so far. Imagine what else the system could provide if your Twitter account was a system-level service.