Mike,
Did you try to just rename the file(s) from .mov to .mp4?
That worked for me running Sony Vegas Pro 9 (64 bit).
My buddy had a JVC HDD SD camera and Vegas 8 just dropped the entire audio track but my new Kodak Zx1 pocket HD cam records .mov and the audio track imports with the video but it’s flat (straight line). So it seems there’s a silent audio track.