OK, so I was intrigued by all this discussion so I went to look at the info about this device..
Road Tech™ Navigation Interface Module
Available exclusively for Harley-Davidson® Road Tech™ zumo Navigation Systems. The Navigation Interface Module will provide an integrated link between the fairing-mounted Advanced Audio Radio and a Road Tech™ zumo 660 or 665 GPS Navigator. When linked, the music volume will automatically drop when a GPS spoken command is detected, allowing you to hear the command through the radio speakers or the 7-pin communications-style headset. The module attaches directly to the radio, is concealed within the fairing, and does not require connection to the "AUX" input on the radio faceplate, allowing you to listen to a portable music device through your auxiliary input. Kit includes adaptor cable that permits stereo sound from the zu¯mo's internal MP3 player or XM® Radio.
76000024
IN-STORE PURCHASE ONLY Contact dealer for pricing and availability.
Fits '06-later Touring models equipped with the Advanced Audio system and a Road Tech™ zumo 660 GPS Navigator P/N 92115-09 or Road Tech™ zumo 665 GPS Navigator P/N 76000014. '06-later FLHX, FLTR, FLTRX, and FLHTC models and those not equipped with Wiring Harness P/N 70169-06 require the separate purchase of Connector Kit P/N 69200033. Does not fit with Advanced Audio Hands Free Cell Phone Kit P/N 76408-06.
MSRP US $149.95The way I read what is in
red and
underlined doesn't say specifically that it will intergrate everything. I'm thinking more on the lines of what Don just suggested that it's just a fancy way of putting an Aux port in the back of the radio. When they say "music volume will automatically drop when a GPS spoken command is detected" I'm inclined to believe they are speaking of the music (MP3's) in the GPS playing which is no different then what it will do when plugged into the Aux port on front of radio. The only extra I see added w/this device is that now you will be able to hear the commands thru a headset (
"7-pin communications-style headset" if your bike is equipped w/it. For those of you that have purchased this and are hoping for more I wish you luck as the specs are written just vague enough to make you think there should be more.

One other thing I noticed was they specifically say this device will only work w/the RoadTech Zumo's which I doubt that to be totally true as those of you w/the regular Zumo's have already shown it will work if I'm reading these specs right.

Ride Safe,
Fired00d
