I have an open iPhone with scope and protocol analyser ready to reverse the iphonesimfree unlock (much like a lot of other engineers around the world I suspect). It should be relatively trivial to reverse, as the way into the baseband is just a serial port.

That's why iphonesimfree are releasing it the way they are. They want to maximise their profit, they know the method should be reversed within a matter of hours of it being publicly released, hence the 500 license minimum, and their reseller approach.

Layton