Tom's Hardware did a review of the ATI AIW, G400TV and I think the Voodoo 3500TV. Check it out. (www.tomshardware.com)
If I remember correctly, the ATI had the best PAL support (it picked up all the channels, even half channels, etc) and the G400 worked ok too by changing some registry setting. Read the real article for more details. It was called "Mutli talented graphics boards" or something like that.
Obviously anything you buy that is made in the US will have NTSC output capability including the above three cards.
BP6, C-366/550 (x2 very soon), 192meg
CL TNT2U 180/230
BP6, P3-700@770 (for now), 320mb, eVGA MX Plus (dual CRT), waiting for VIVO module