I guess some companies are tired of waiting arround and just release it. Sharkoon is releasing a USB3.0 Controller nased on the NEC-µPD720200 Chip with two USB3.0 Ports. Unfortunately the product is waaaaaay too expensive at 39.90 euros

"Ten times faster than the USB2.0, data transfer rates of up to 5 GB/s, enhanced transmission reliability and energy efficient: The new USB3.0 interface now also offers an over abundance of bandwidth for data transfer applications. However, Mainboards and peripheral devices that allow SuperSpeed USB?s simply can not wait. Sharkoon is the first provider to immediately offer a PCIe controller so that the Desktop PC can be quickly and efficiently upgraded: The Sharkoon USB3.0 Host Controller Card is equipped with a NEC µPD720200 chip; the two USB3.0 Ports are combined with the PCIe 2.0 so that it can conform to Intel xHCI-rev0.96 specifications. The controller card can connect directly to the PCI-x1 slot and operate a larger PCIe slot with a connection speed twice as fast; it possesses a 4-pin plug to the power supply over the network, and supports the operating systems Windows XP, Windows Vista, and Windows 7 (32 Bit / 64 Bit). "