Dude... I intend to use a 2010 Mini for gaming, too. But don't hope for too much.
I have a 2009 Mini currently, and it does a pleasing job with the games of five or six years ago - anything more current doesn't run too well, if at all. Although I expect the 2010 Mini to be better, it won't be much better. The 320M's a pretty moderate chip.
Speaking for the 2009 Mini; it runs Doom 3, Half-Life 2 and Return to Castle Wolfenstein quite well, and Quake 4 adequately. Apple claim that the 320M is around twice as fast - so, in my vague opinion, it'll do a kickass job with older stuff, and do a vaguely-kinda-maybe acceptable job with the stuff of two or three years ago.
If anyone knows better than my speculation, please let us know.
