to the best of my knowledge there is no pci card that provides HDMI...
pci-e yes, but then you need an intel based board with a pci-e slot, (those are NOT cheap!)
if you want a cheap board with a cheap card to do that, you're out of luck.
however i do know that it is possible to get a jetaway board with a DVI daughterboard.. thats as close as you get i believe.