nah the gfx card has a little svideo type adapter (its no svideo but same size and shape) on that adapter it has rgb, svideo, and composite. it also has a vga and dvi output on the card.
im not sure, if you want hdtv, you can either get a newish geforce card, which comes with the hdtv adapter, or you could get any of the 9x00 series of ati and buy the hdtv adapter.
the 6600 is pretty cheap, and good for games and stuff.