Weve heard from multiple sources that Twitter is likely to have a big-time partner for such a service: Apple. Specifically, were hearing that Apples 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.