Waste of money? I paid $200-ish for a dead server, with 10GB of PC133ECC (or so). That went into my server, with 4DIMM slots, equates to 4GB of PC133 ECC REG.
Also, it's running Serevr 2003 Enterprise... Neither a consumer computer, or a waste! It will run 4 instances of BL (Maximum) and also host an FTP site, a (small) webpage, and some smiple filesharing.
And when I used to host RTB, I would occasionally find Blockland eating ~500MB, and 50% CPU time on a dual 850/100 P3 setup.
@Bisjac- You take the maximum 32-bit adress area (4096MB) and subtract only for video memory- My system shows about 4032MB in the OS. It has a 65MB onboard ATI-Rage card.
@Trader- I offered to share my resources- You refused! :D