Old post.

But i just bought this thing:

http://musicpal.info/

Pretty cheap i think (129€ at dixons for me, under 100€ ordered online)
Linux based (they used to have some problems obeying gpl, but are getting better at that: http://www.musicpal.info/gpl.htm )
I like it so far, haven't tried the media server part, but the internet stations just work nicely. Sound is ok, for such a small box. Configuration through menus or html menu. Supports rss feed tickers, weather, stocks(not that i have any)
I like the big rotary buttons too.