The Videogamesplus Team has tested Gears of War 2 and Gears of War 2: Limited Edition and confirmed that they are both region free.
However, the bonus disc that comes with the Limited Edition isn't region-free for those wondering.
Also, it turns out that Tom Clancy's EndWar is also region-free!
Finally, it has been confirmed that Rock Band Track Pack Vol 3: AC/DC LIVE - 360 (Preorder) is NOT region free. More PlayStation 3 News...