I have a P4 2.4 Ghz with 2.5GB RAM. I was able to run 64 players on the demo and the CPU was consumed between 98%-100% and there was never any lag. Now I know it is bad to peg your CPU like that, and I'm sure there would possibly be lag spikes sometimes... So I wish I had a better CPU. But I'm wondering what kind of performance you saw with the demo.