ST Microelectronics $15 Cortex-M4 Development Kit
cnx-software.com
cnx-software.com
Looks similar to the NetDuino space although frankly I'd love to see a microSD card slot for holding stuff rather than simply relying on the on-chip flash.
I'd love to understand the lowest cost HDMI compatible frame buffer interface one could put on these. I've got an idea/application that I started prototyping on a Chumby which would benefit from their price point.
ETA December at current rate and enough real world examples at the alpha stage to be a cut above vapour :)
http://search.digikey.com/us/en/products/STM32F4DISCOVERY/49...