Cedega supports the Grand Theft Auto games, the very recently released Battlefield 2, and a huge variety of others. World of Warcraft runs on plain Wine. I can't agree with you on not being great for running Windows games. As for ATI, yeah, thats a problem. NVIDIA is much better supported, but it's working isn't it
And I still have my Windows partition for games and Visual Studio. Don't have Cedega...yet.