I used anycut and got the update. I'm not sure if it really help or if it was my time to receive it, however I think it worked.
i used anycut and device management to try to force the update. it states that you received the update and so on. after the phone rebooted, i check About Phone under settings and my firmware is still stuck on 1.5
i didn't get the update from t-mobile. apparently that's the only way to get the samsung/tmobile official 1.6 update. for some t-mobile doesn't know how to send out updates.
it blows my mind that the users and private sector developers have to go to work to figure out how to update this samsung pos device for the rest of the users.