Cables Unlimited announced that their wireless USB adapters are for sale and are "easy" to use. They aren’t exactly cheap at just over $80… but I love the idea. Only negative I see is that they don’t handle wireless power… so no webcams, etc…
No special software is necessary, it’s as simple as plugging one adapter into your computer’s USB port and the other into the USB port on the device up to 30 feet away, and letting your computer recognize the connection just as it would if there was a USB cable there.
[Source]
