<< OS + game + winamp + windows explorer + perhaps IE open. 256 is really gonna cut it all the way into this year? Not a chance! >>
Dayum! You really do like to use every ounce of power at your disposal don't you? 😉 Personally, when I'm running a game all I have running is the game (and all the little crap that's always running in the background, but doesn't eat up a lot of resources.) Like a lot of people here, I have several systems and one of them happens to be right next to my gaming system. So I just leave all my instant messengers, winamp, tv tuner, outlook, etc. running on that one while my other system is just fine running something relatively demanding like RTCW or Nascar 2002.
I've tried 512 in one of my systems before (both of my primaries run W2K) and I never noticed a difference in the games I played. And 512 doesn't really make much of a difference in any of the major apps I usually run (office suite stuff, GoLive, WebTrends, CF Studio etc.) For people with multiple systems like this, I don't think there's any real need to have that much RAM if you can easily distribute your applications across other computers. Plus, that way I could distribute my RAM more evenly across several systems and not have one mega machine and several piddly boxes.