This may be a silly question but is there any reason why I can\'t compile sources on the Zaurus?
Nope. not really, most of the software on these feeds is ported and not native code anyway.
The main problems you hit are screen sizing issues (less of a problem on the 640*480 machines).
The other problem is support for gui window managers and libraries that don\'t come with the stock zaurus. Most of these have now been ported to the zaurus in many different formats.
Check out the x.11 rom and gentoo dist, in the x.11 forum on this site.
There are onboard compilers and cross compilers available for all the roms so it is all possible.
There seems to be 1 or 2 new ports being added to the list every day at the moment, especially for the x.11 rom.
Peter