Twinhan VisionDTV Mini Cab DVB-C PCI
The VisionDTV Mini Cab DVB-C is a PCI card by Twinhan. It is either well supported under Linux or only partially supported with strong artifacts in the picture. As this edit is fairly old, perhaps it works now? The underlying hardware is a BT878 chip.
This card supports DVB-C reception, all QAMs including QAM256, but (free) HDTV channels can't be recieved (tested in the German KabelBW net which uses H.264 for HDTV content, so maybe it's due to this non-MPEG2 standard and otherwise MPEG2-HDTV content could be received).
It comes up in lspci as
0000:00:0a.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11) 0000:00:0a.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)
Not too difficult with a newer 2.6 kernel -- see the article BT878 for a howto.