HI i just got a the P1 board from this guys .
http://soc-machines.com/
it comes with 2 cpus (analog device's blackfin 800 mips and and an atmaga64 avr )and possibilitty to buy an fpga and and other boards that connect to it )
This board is cheap and very proffesionally done .It comes with software (monitor sources ) and connector to program it .They will be realeasing a new arm based board that connects to it .The arm will be running Clinux and all the dsp power will available to do just DSP processing .This if you don't want to run Clinux natively on the blackfin.
Well ,price is just $95 .
You can also connect digital cameras to it .As a matter of fact this dsp comes with a
Video precessing unit .
Features
o Blackfin ADSP-BF532 400MHz DSP Processor
o AVR ATmega644 8MHx Supervisor Processor
o 32Mbytes 133MHz SDRAM
o 1Mbytes Serial Flash (2,4,8M optional)
o 2 RS-232 Ports, 1 RS-485 Port
o 8Ch 10 bit A/D
o General purpose Video Input Port
o 7 Bi-directional I/O Ports
o Blackfin Memory/SPORT Expansion Port
o Extensive Source Code examples
o GNU C compilers for both processors
o 4-7VDC input, 3.3V on board @40-150ma
o Small form factor (2.9x1.9in)
**broken link removed**