oh... I was confused by the TR 808... I didn't know if this one had midi.
The MC 808 is pretty new, it should be aiight. Although I don't understand why you'd want to midi out P5 into the 808 : this groovebox has its own sequencer designed for some live stuff.
I'd think, it would be more logical to have P5 controlled by the 808... this way, you could use the internal sequencer of the 808 to trigger some stuff in P5... if both are synced, with a bit of midi channeling work, you could get some great stuff... think of a groovebox with its own sequencer triggering its own pattern while sending midi to the groove matrix that triggers its own patterns.
yeah... I'm just dreaming out loud ^^