In the spirit of finding higher-power, DSP-capable, easy-to-program development boards, here's a relatively new offering from
LeafLabs called the Maple. In contrast with the
Spin FV-1 board I posted about a little while back, the maple is set up more like a highly-powerful microcontroller development board.
The
STM32F103RB chip is a little more like an
AVR32 than the Arduino's AVR because it's 32 bit, it runs at 72Mhz, and it has 16 channel, 12-bit ADC (still waiting for a microcontroller with onboard 16-bit ADC). It costs a little more ($50) and the development environment is not nearly as mature, but it seems like a very powerful board with a similar design philosophy.
-Colin
