Low Cost HDTV Cards

Dozer writes "TerraLogic's new Janus-based HDTV cards allows a PC user to get some excellent HDTV without draining the wallet. The cards will do line doubling and handle AC3 audio, all for less than 10% of the cost of an HDTV set..." So I want that, Linux support, and then HDTV broadcasts of every sci fi movie ever.