> I'd suggest Atmel's AVR series, either ATtiny or ATmega, depending on the 
> requirements, (...)

I second that! The ATMegas are really great. I have build a 
radio-controlled alarm clock with an LCD and binary display.

Later we build an inverted pendulum as a university project (computer 
science), controlled by an ATMega88 (2.60$). Complete Board was around 30$:
http://www.inverses-pendel.de.vu

Next project will be a 8x8x8 LED cube. I've made some tests and I'm 
confident that an ATMega88 will be sufficent to control 512 LEDs at 
100Hz refresh rate, while still having recources to receive frames to 
display over a serial interface.

Manuel

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