Oh. DUH. lol
I haven't looked into it in a while, but I believe HD is its own codec; different from MA core. So, if that were true, I don't think that HD capability equates to MA capability.
I think one of the main reasons that MA was so tough at first is because it comprises of TWO concurrent streams. Core + extension.
If it cannot send MA either as bitsream(s), or unpacked, its definitely something to scratch off the list for me. OTOH, Im sure others into for the video, on a budget, could happily welcome this deal.