Hmm, Dallas One Wire interface - sounds like something Patrick could possibly add to his new Tuner while its still in early production.

Such a interface could be used for all sorts of things, and as the car already docks to the tuner when its in the car theres no need to hack the sled or open your empeg to borrow the mic input wires for a One Wire interface.

This could be used for external temperature sensors - which some folks here have expressed a real interest in.

I'm sure the Tuner/Empeg protocol is flexible enough to accomodate a 1 wire interface to developers in the empeg.