At CeBIT 20011 Asus presented the WAVI Xtion (see the press release) device. It seems to only offer depth data, no RGB camera. I haven't found anything about the price yet. It's also not clear if you can only buy the Xtion sensor along with the WAVI wireless media streaming device.
From the press release: "ASUS plans to launch the Xtion Pro Developer Challenge in March" - Let's see whose SDK comes out earlier, Microsoft or Asus.