I dont think enough people use it to warrant it.
I think this is a changing trend though especially with microsofts new licensing and the impressive GUI tools that linux now provides.
I have also been looking for games for linux boxes a few linux compatiable games that are also compete with Windows are
QUAKE
Americal Army
pingus --- > like lemings
netpanzer
QuantumStarSE
a good website to go to is
http://www.frankscorner.org/
where you can find ways to using windows games on linux
-JAX