Only just read this! Apparently announced at this years WWDC that EA are bringing some of their biggest titles to Mac! Sorry about the flurry of exclamation marks
but these games include one of my favourites, Battlefield. The list includes Need For Speed Carbon, Harry Potter and the Order of the Phoenix, the afore mentioned Battlefield 2142!! and Command & Conquer 3 Tiberium Wars.
They're using some technical wizardry called 'Cider' which somehow allows you to run Windows based games in OSX with little change to the programming.
All the games mentioned are slated for release this month(?), according to the article I've read about this in.
If anyone knows more about this including different release dates, other titles announced and wether or not online gameplay with windows users will be an option, please let me know!