I believe they matrix down-mix the audio, so applying Dolby Prologic will deliver some of the original surround effect. Plus, they've said they're working on multiple audio tracks (and selectable subtitles) to deliver 5.1 in the future. I hope they designed this disc so it can be updated with BD-Live to introduce new features. Right now it's only taking about 3k of persistent storage.
I still use the disc rental for block-busters, but for Britcoms, and other low-budget entertainment, this is a perfect filler.
