I thought ide-scsi was broken?Try passing the -t iso9660 option to mount or (if that doesn't work) you could go so far as to removing the UDF support from the kernel.
I had a brain fart. I was using -o instead of -t =(
I do have DVDs playing now on 2.6.0-test3. I used ide-cd instead of
ide-scsi. apparently the scsi layer didn't like it.
Buffer I/O error on device sr1, logical block 7651
Buffer I/O error on device sr1, logical block 7652
Buffer I/O error on device sr1, logical block 7653
end_request: I/O error, dev sr1, sector 660400
I would get tons of Buffer I/O errors and some end_requests like the above