If there had been a really compelling reason to use WinCE, we probably would have done it. It would have had to be *really* compelling, though - we didn't use linux specifically to make it easy to hack on, it was just the best OS for the job.

Bear in mind that the Rio/Dell box we did for them runs Linux, and we have a lot of knowledge on the embedded linux front. It'd be a shame for that to go to waste in future products, wouldn't it? :)

Hugo