WiQuest keeps pushing the ultrawideband (UWB) envelope: It's latest chips can top a gigabit per second. This linked mainstream article suggests it's "turbo-charged Wi-Fi," but UWB only works at high speeds over very short distances, making it a great cable replacement for FireWire and USB 2.0, among other wired standards. The WiQuest technology is ready for sampling, the company says, but it doesn't conform to any current standard.
A technical piece at EE Times provides a bit more detail, including the fact that competitor Freescale is complimentary of WiQuest pushing the envelope. Freescale expects 660 Mbps chips by early next year. The 1 Gbps rate works just within five to six meters, good enough for some home-entertainment purposes and computer peripherals. The first version of the chips are in reference designs for USB 2.0 replacement, with both host and adapter designs for complete integration.