Thanks for the quick reply, I'll test it when I get home (as I probably should have before I posted in the first place).
Reliability is the only thing holding me back from integrating the 8300. Back in my early days with MCE 2005 I was with Bell and suffered occasional issues with the IR blaster missing a digit with the Bell receiver. The occasional missed recordings were more than a minor issue, and there are still some bitter memories from my family. My current setup involves HD OTA and analog cable, both of which don't use the IR blaster, and although I recently integrated an SD digital box (e940) with no IR issues in over 2 months, I'm still hesitant as even rare failures of recordings could cause me to lose the HTPC fight for good.
To summarize that long and boring story, I need it to work perfectly. Does anyone know if firewire channel changing solve that issues with STBs, or does it have it's own reliability issues?