Project:HackSat One
From London Hackspace Wiki
Flux has ordered a Kicksat dev kit. It's due in May 2012.
"Just to give you an idea of what you'll be working with, the microcontroller on the Sprite is an MSP430 from Texas Instruments. The exact part that will be used in the flight units has not been decided yet, but it will have at bare minimum 2 kB of RAM and 8 kB of flash memory."
More details soon...