I've read nice things... a long time ago about the Bus Pirate wrt. protocol analysis/exploration (maybe not for high speeds): http://dangerousprototypes.com/doc

I've read nice things... a long time ago about the Bus Pirate wrt. protocol analysis/exploration (maybe not for high speeds): http://dangerousprototypes.com/docs/Bus_Pirate http://dangerousprototypes.com/docs/Bus_Pirate