Yes..just follow this thread..
http://forum.lowyat.net/topic/796445

The Dev team havent have the unlocking software yet
But actually my friend in the US unlocked his AT&T using siftware already..
I've seen when i skype with him..
He say he's not gonna put it online so too bad... =p

Note : I won't be responsible if my friend if lying but i don't think so..