1) OP...did you buy one?
2) I too was recently looking for a USB 3.0 port. But i think that the links provided are for PCI*16 slots(correct me if i am wrong). I just have a single PCIExpress *16 slot, which my graphics card is using up(8600GT

). If the USB card is using PCI*1 slot, then its good i guess....but seeing the card connectors i think they are PCI*16 cards.