I have a nicely overclocked 2008 Macbook Pro (2.53 to 2.94 GHz, dramatically increased GPU clock speeds) that plays nicely with games. Windows 7 64-bit edition. 4 GB of RAM. 512 MB of video RAM.
List of games:
Dead Space: Runs with everything except for vsync on maximum at around 50-70 FPS, sometimes breaks 130 and other times goes as low as 30.
Dead Space 2: Same as above, everything maxed out except for vsync, and gets slightly higher FPS.
Bad Company 2: All textures on medium, shadows on low, medium filtering, full res, no AA. Varies from 90 FPS to 25 FPS.
Team Fortress 2: All maxed except for water, which is left at default (soft reflections of world) and 2x AA. 70 FPS steady, some 50 FPS during intense Pyro vs. Pyro vs. Pyro fights.
MW2: Everything except for shadows and AA maxed, gets smooth 70 FPS.
Black Ops: Naturally glitchy game, everything except for AA and shadows and shader warming is enabled. Textures and other effects are high/medium. Feels stuttery but FPS stays around 50-60 FPS. Inexplicable, probably a game issue.
Fallout: New Vegas: Used "High" profile, changed resolution from 1280x700 to native 1440x900 and turned down AA but left filtering where it is. 60-80 FPS, sometimes 40, sometimes 100.
Portal: Everything maxed, 130 FPS.
Garry's Mod: Everything maxed, 130 FPS.
Bioshock: Defaults, but changed to no AA and lowered shadow warming, maxed out resolution. 50-90 FPS, feels kinda stuttery for no reason at times when hacking.
Only crash was when I pushed the processor to 3.06 GHz and it did a hardware crash. I've gotten a few BSoD's, but that's because Daemon Tools messed up with an .iso file.