Lol
Well, trust me when I say it's a TV-In... I've got an ASUS GeForce FX 5200 and - frankly - given the price I paid for it, there must be a TV-In.
Naa, seriously. There is an extension multimedia connector. It has S-VID IN, COMP(osite) IN, S-VID OUT and COMP(osite) OUT signals. The connector is plugged into a small din looking connector on the video card.
The card was shipped with Asus PowerDirector for video capture. Setup installs an analog video capture driver. And it does have a S-VID decoder inside. But the CDs are only for Windows - heck

.
So are you still telling me I'm dreaming? :-p