I posted this to HN forever ago, it's a list of games coming to Mac OS X in 2010 and 2011: http://neosmart.net/blog/2010/our-list-of-highly-anticipated...
Only games scheduled for simultaneous release on both Windows and Mac or Mac-only releases are included in that list. Games that are being ported to Mac after being available on Windows or gaming consoles previously are not included. StarCraft II is the first of the bunch, and there are a _lot_ more exciting games to look forward to. I think the days of OS X gaming are finally upon us.