I like dark chess too. :)
Dark Chess

I disagree. Seems to me the thing that makes chess.com cool is that it focuses solely on the game of Chess as it is.
There are plenty of other sites that do the variants. Dark Chess, Chinese Chess, Anti Chess, Crazy Screen Chess, Atomic Chess, Dark Crazy Screen Chess, Knightmare Chess, Extinction Chess, Grasshopper Chess, Horde Chess, Kings Corner Chess, Kings Fortress Chess.
I recently played the X Box live version of Chess and one of the variants was dark chess. Where you can only see your own peices and the opposition peice that you are directly attacking. It is an awesome game and more workable than blindfold chess and actually works better on a computer and I don't think that it is really open to cheating. I would be really chuffed if you could get dark chess on this site. And it is a really skillful game as well!