definately want doing:
1) reflash games so they include matrix by llamasoft amongt others (super breadbox, c64abalt, get em dx, etc etc)

may also want doing:
2) fix the dodgy resistor/ whatever causes the colour problem (I know the system pallette can be altered to deal with this slightly also)
3) keyboard / keyb port adding

if possible would love doing:

4) DTV hooked up to a swinsid with ome kind of .sid playback or retrokoi/ goat tracker flashed into internal memory.
5) add another joytick port

If you can do these, or know some genius who can, hook me up! I realize 4) may be a stretch