Present Elite AVRs (72 & 74) will do multi-channel PCM over HDMI now..
This is part of the HDMI 1.1 compliance specs.. The latest HDMI specs 1.2a adds SACD capability provided the DVD optical SACD player also is 1.2 compliant..
Apparently right now those receivers are having problems with low frequency effects over HDMI and the problem is with the receivers and not the HD-A1.
I was under the impression as well that no receivers could do 7 channel pcm over HDMI. This is not a limitation of the HDMI spec but of current pre/pros and receivers. I could be wrong.