iv'e unlocked my galaxy tab yesteday with this instruction: http://www.galaxytabnews.com/news/sim-unlock-galaxy-tab/
i had only the netlock on from vodafone spain, but i was curious about if it works, and yes, i´m lock free, yeahhhhh!
careful, if you don't know what you are doing you can perhaps use it as a brick after this procedure, no guarantees at all
you are the only responsible if it fails....and now i lean back and enjoy me new unlocked galaxy tab.....