Rule #1 - Be Patient - Rule #2 - Don't ask when, if you don't contribute - Rule #3 - You have coding skills - LinuxMCE's small brother is available: http://www.agocontrol.com
I have successfully streamed and changed channels from My DCT6200 (did not try recording yet) using LinuxMce 7.04 I followed the mythtv firewire notes to get it going.