Wooooohoooo! Confirmed on Rogers Wireless in Vancouver, Canada.
SMS text and phone fully functional.
Methods:
http://iphone.unlock.no/ and
http://modmyiphone.com/wiki/index.ph...iPhone_iUnlock
These two tutorials seem to be the easiest to follow, but they have different approaches with minicom.
http://iphone.unlock.no/ is more elegant, but the modmyiphone site has better laid out instructions.
Tips: Make sure to read the instructions very carefully with the SIM removed until the very end. Also, DO NOT sync without a SIM card inserted after the hack is completed. iTunes will prompt you to sign up with AT&T again and you will have to start over.
Big thanks to all the hard working developers!