Twitter fanatics are gonna love this. The browser safari, YouTube and te phone camera are just some of the options from where you can tweet in iOS 5.
Therefor a tweet will always contain an attachment from the application. Apple seems to be broadening their possibilities. Apple developer Jake Behrens sent a tweet on the 21st without attachment, but with the text ‘via iOS’. This looks a lot like qTweeter, used on jailbroken iPhones.