It is in draft form right now. The IEEE will be voting on it in May, or thereabouts. Won't be ratified completely until the fall most likely. The stuff out right now is Broadcom chipset based. Intersil based hardware is forthcoming. The stuff you buy today will "likely" be firmware upgradeable to the standard once it is set. I would suggest, if you can't wait, you buy client and AP that are using the same chipset.