Anyone know if this would work??

Does anyone have one of these that can verify if this would work on a ps2??

http://www.lik-sang.com/image.php?category=23&products_id=1939&img=3in1pcjoybox

Im wanting to use a saturn pad or DC pad on my ps2 for all the upcoming ports from SNK. Does anyone know if this USB pad would work on a ps2?? Or does anyone know where I can find a converter to use Dreamcast pads on the PS2?

From the looks of it, that converter is used for PC only. It would read the DC/PS controller as a normal USB controller.
So, get a USB controller and see if that works on the PS2, if it does, there's a good chance the adapter will, too.
As for a normal DC->PS adapter, if Lik-Sang ain't got it, you're SOL.