Have just bought the router (in the post now) am intending to investigate USB audio, will report back. Just bought maplins £12.99 usb sound card. works fine ordinarily, waiting to try with router.
Own a USB DVB-T TV tuner. FYI it won't even route the data through a belkin USB2 hub without losing image quality/audio synchronisation. So video may be being hopeful... again will test when have time.
I second the audio compatibility list idea .