I upgraded my ML8000 to a mini atx motherboard and an AMD athlon 700. I am also using one stick of DDR400 512mb and a 5400 40gig HD.
The main reason I wanted to post and say the the M1 is working really well. I am not sure what the wattage on this set up is... because every calulator gives me a different number...
Soon I am going to look for a mobile amd athlon to replace the 700.

Bmo