has anyone written a patch incorporating the serato scratch software and
the monome?

Or M-Audio Torq, Native Instrument's Traktor Scratch?

not that i know of.  i was gonna do a Traktor one, since it uses OSC, 
but i only have the LE beta version.

I hope to write something for Ms. Pinky system down the road. It's 
open-source and would probably be the easiest way to go for Max/MSP 
coding. With example scripts out there already. If anyone beats me to it 
please post here.