With a MAC from Intel and a PHY from Alereon, 480 Mbps UWB is shown: The two companies have collaborated on this demonstration, showing high-speed ultrawideband. The MAC (Media Access Controller) is the network side; the PHY (for physical layer), the radio side. Even more interesting, Alereon's side of the equation used a PC Card form factor module. They've had evaluation gear out for testing UWB for months, and they're continuing to push forward.
This doesn't mean that Alereon is ahead of (or behind) other UWB firms because those other firms may be choosing to work with fewer partners or not demonstrate as publicly. We'll see what shakes out by Christmas.
Om Malik had a brief interview with the CEO of Alereon in which that executive notes that the key utility is cable replacement not streaming video, which is an interesting take, but makes sense within the context of the Wireless USB Conference.
The Wireless USB 1.0 specification was approved at the conference today, according to Om.