The speed of changes of modern tecnology never ceases to amaze me. Got myself a MicroMite – a single chip PIC-32 with MMBasic firmware…..
Result? – add a 47uf tantalum cap, power up at 3.3v an away we go. 100% functional computer with a simple yet powerful Basic interpreter built right in. Amazing. Needs a $5 TTL – USB serial converter but thats it! My TRS-80 had less power than this puppy
http://geoffg.net will get you started including where to source the bits.