I believe WinCE is MS's client OS that also serves as the basis for Windows Mobile, although i might be mistaken about that. I've seen a few Win CE devices coming up recently, with NAND flash memory. The DMB part means it won't come to the US.

This looks like it would be fun to play around with. Other than networking, it looks like it's optimized to play multimedia content on a larger external display from SD. No BT, but you can fit alot of different phone-centric flash card formats (RS-MMC, mini/microSD) into an SD slot. The keyboard design is kind of mesmerizing, maybe too much for me to use it without blowing my mind, particularly if it lights up. Also, the web browser on this particular device had better be well optimized for the 4.3" LCD display. I would hope it has USB host, though, to make it really useful.