Yes that's right, Today Tim Cook the CEO of Apple announced that Apple is working on a way to combine Apple IDs, Developers who use more than one Apple ID are running into a major problem with iOS 5. If you turn on Automatic Downloads with your Apple ID, you cannot auto-download or download past purchases with a different Apple ID for 90 days.
So we may see this feature in official iOS 5.. who know's, let us know what do you think about this...