Rosewill 2-Port USB 3.0 PCI Express Card $15 at Newegg

Newegg has the Rosewill RC-505 2-Port USB 3.0 PCI Express Card for $27 - $12 off with coupon code EMCNAHE84 [Exp 10/1] = $15 with free shipping. Features two USB 3.0 ports with up to 5Gbps transfer speeds, and is backward compatible with USB 1.0/1.1/2.0 devices.