I've been using a 3.06 P4 Notebook. It's pretty quick, the ATI graphics give a 3d3001se mark of about 6500, so it's not bad, infact pleasure to use.
Bad point are that it's heavy and it does throw out a lot of heat. But it does throw it out, it's running temp is fine.
Intel Core2Duo 6400 @ 3.4Ghz
4GB Geil 6400 Ultra
3 x 500 Gb Samsung HD
EVGA 8800 Ultra OC