If you want a PCI slot card the only option that I've found is the Miglia AlchemyTV card.
I've got one, works great for viewing TV.
I haven't gotten the capture to work the way that I want yet though. Results in VERY large files that I'm still putzing with converting to something smallish. A few minutes of video will run 100MB or more, but ideal would be to get down to like 300-400MB /hour.