blackfin.uclinux.org : Home of the Blackfin; GNU tools, uClinux and open source hardware.

Section5 : Insightful uClinux resource and home of the ICEbear JTAG adapter.

www.blackfin.org : A great repository of information for all things Blackfin related.

www.analog.com/blackfin : Analog devices manufacture the Blackfin DSP chip.