Add support for piping in audio to the standalone version.
Add optimized 24bpp translation routines (most 24bpp is in fact 32bpp?) 
Get rid of needless copies in 8bpp.
Enable XFree86-DGA, but remember that most CPU time is used for creating 
  the image, and XFree86-DGA also increases the risk in case of a crash.
Add video mode changing stuff to the libxpce DGA code.  This would be the main
  benefit of DGA.
Allow access to libxpce configuration stuff through dialog boxes.
Perhaps add frame rate limiting.
Remove spaces from filenames because Unix programs can't handle them.

