D on WinCE / Windows Mobile and PalmOS

[Chad J]

I intend to write a game for PDAs, namely the WinCE and PalmOS 
varieties.  One of the options I see is to use GDC as a compiler for 
these platforms, which would let me use my favorite programming 
language, D.  However, there seem to be a lot of obstacles, like a lack 
of phobos.  Maybe I'd cross-compile it onto those, or use Ares, or I 
dunno really.  I am inexperienced at dealing with GDC or GCC or any of 
the inner workings of D.  How long would I have to work on this to just 
be able to start writing my game?

Another obstacle I face is coming up with good SDKs.  Using Java would 
save me a lot of time because of the excellent GUI support.  D does not 
have much GUI support at all, IMO.  I've heard talk of porting SWT to D 
and using that.  How long would that take to get working?