I put a JMCB2003 unit on my 97 standard.
Blondie's '99 Tourer has one of those units installed. I recently added a Kennedy Technologies FRSet4 and a set of interfacing cables; this allows one to use a FRS/GMRS or a ham rig in conjunction with the J&M's intercom/headset function. Meaning...your helmet's headset can be used to supply TX audio and listen to RX audio from the companion transceiver.
Having a communications option besides CB is handy, especially when you're at one of the larger rallies and all 40 channels are tied up ...
