Oop, you're right. There are a few 4 USB port, 80 GB models. The majority of the 80 GB models have 2 USB ports and no SACD support.
I'll stand by my DVD-Audio support statement. While most DVD-Audio discs do have a DVD-Video section which can be played on any DVD player, only DVD-Audio players can access the lossless MLP data on the disc. So if you're playing a DVD-Audio disc in the PS3, you're getting the Dolby Digital (or on a few rare discs DTS) lossy compression.
Hmmm, that's certainly possible I suppose. it was indeed a surpise when I put one in and it worked and all 5.1 channels lit up on my receiver and this was for the straight audio tracks, not the video mini-documentaries.
Interesting they would actually pack Dolby song tracks along side the DVD-A tracks. I would have thought they would only do that to accompany the videos.
Still pretty happy to get 'non-live' music tracks in true surround sound for a change of pace.