Microsoft's Chris Satchell just announced that XNA Game Studios games can also be made for Zune. He showed off a brief demo of Zauri – a topdown shooter. XNA Zune games can also support custom soundtracks (this is an MP3 player after all). Satchell promises that you'll be able to take games from Windows, to Xbox, to Zune. No word on the availability of this functionality on Zunes; more as we know it.