Actually, it's unconfirmed about cross platform play between PS3 and PC for Unreal Tournament III. The news only said that Gamespy was being incorporated into the Unreal Engine 3 for cross-platform play.
http://www.ps3fanboy.com/2007/08/17/unreal-tournament-3-cross-platform-play-still-unconfirmed/
Threads of Interest:
The Movie Thread: http://www.vgchartz.com/forum/thread.php?id=6880
The Crow Eating Thread: http://www.vgchartz.com/forum/thread.php?start=0&id=3886
The Betting Thread: http://www.vgchartz.com/forum/thread.php?start=0&id=7104
Custom GIFs Thread: http://www.vgchartz.com/forum/thread.php?id=18963
The Greatest Game Ever Conceived On Any Platform
Tag: "I have tasted Obi-Wan's bitter tears"