Well, I finally got around to ordering a Robostix board today. It is a small stick with an Atmel ATMega 128 8-bit processor and some pinouts. I also acquired a AVR In-System programmer from Digikey so I can program this little board. I will most likely purchase a gumstix board down the road. But for now I get to play around with this and write some servo and motor control software using ansi C. GCC-AVR (aka "Whenever") can be used to compile C code for this device.

I'll take some pics and post more details when it's arrived and I've dug into it a bit.