Trammell Hudson has been working to get Magic Lantern into the new 2.0.4 firmware for the Canon 5D Mark II. It sounds like he is very close. Here is a quote ripped from DVInfo.net Go Tramm Go!
“The new features in 0.1.8 are (besides 2.0.4 firmware support) auto booting, waveforms, spot-meter and USB control (via PTP). There isn’t really that much new code, so hopefully it won’t take too long to decide that the stability is unchanged from the previous release. The ML audio control doesn’t inter-operate with Canon’s, so you have to use the ML menu and con-fig file to set the gains. 1080i HDMI continues to be problematic and there is no estimate for when/if it will be functional.”