Mbed - founded by ARM folks, an LPC1768 ARM Cortex-M3 based board. The "special sauce" is that the board looks like a USB drive that you drop your programs onto, as well as providing a web-based development environment, making it more cross-platform and usable even with "locked-down" computers. It comes in a "STAMP-like" 40-pin 0.1" pitch DIP form-factor. C++ programming with many peripheral API libraries. It has 10/100 Ethernet MAC and an IP stack, but you need to add an Ethernet jack (like the MagJack SI-60002-F, which is ~$5). A 100 MHz ARM with 64 KB of SRAM, 512 KB of Flash. It looks like 25 GPIOs pins that can also be 6x12-bit A/D, one 10-bit D/A, 6xPWM out, 2x I2C, 2x CAN, 2x SPI, 3xSerial ports. 4.5v-9.0v input, 3.3v and 5.0v regulated outputs. Pre-order price is $60. Supposedly final MSRP is $99. I think $60 is more reasonable, because at $99 you have to ask yourself why not go Make Controller kit at $120 and have all the motor drivers.