CSR, a major Bluetooth chipmaker, backs WiMedia Alliance's flavor of ultrawideband (UWB): The jockeying as the UWB war nears market entry is underway. CSR is a member of the WiMedia Alliance, but this announcement nonetheless signals their commitment to move Bluetooth profiles--like object exchange and hands-free audio--to work over the Multi-Band OFDM flavor of UWB.
Meanwhile, Belkin told me a few days ago that their wireless USB 2.0 UWB-based dongle and hub combination, relying on a design from Freescale, will ship in July not early spring as originally announced.