Windows and Mac only so far, and using Limera1n's exploit. But pretty much is the same, but if you had problems with the LimeRa1n app on the device not deleting, this only uses a thing called "loader" and it will delete.
Be ware of other sites though, was looking round on youtube and site very similar in URL and other YT videos give a fake version/website of greenpois0n.
I am waiting for the Unlock as well. I hate AT&T. Their network sucks and their customer service is horrible. I like Apple and everything they produce but I do not agree with the fact that they want to tell you and me how, where or who to use our iPhone with. You and me paid a lot of money for that iPhone therefore we should have the freedom to do with it as we please and use it with whoever the hell we want to use it with. Apple has NO right to control how we use our phones. That is complete B.S.