I happened upon an avc-2310 device which I've managed to get working using the avc2210k driver and 1.3 firmware. I can view mpeg2 data coming from /dev/avcap0 via mplayer, etc. My intention was to use this as a capture device for MythTV, but it seems there's currently no support. Is anyone working on this? There is already support for MPEG2 devices such as the PVR-350, though I don't know how ivtv compares to this driver implementation. Any insight would be appreciated.