Over the last years you could buy (at least in Europe) a Honda branded Garmin Streetpilot 2610 with a remote control on the left clipon with which you could use some of the basic functions, like zooming and volume control, with your left thumb. It also came with a special mount for the VFR (bolted to the clutch and brake reservoir).
Euro versions looked a bit different from the Japanese navigator. Unfortunately I can't find the link to the flyer I posted here on VFRD before. Also the Euro Honda sites don't show the nav set in the VFR accessory list anymore.
The Streetpilots have now been replaced by the Zumo 550. The pic below shows what is included in the nav set:
Curently only the Japanese Honda website mentions the nav set. The Euro sites provide no further info at this moment.
The nav set comes with helmet speakers, but you can can also use the Honda (Gathers M) bluetooth communicator with the Zumo.
Below a close-up of the remote control:
You can also use the remote control to browse through the MP3s stored on the zumo and some other menu's, so you don't have to take your hands off the clipons.
This page offers a download link to a 148 page manual (in Kanji). Looks like Honda did a better job on making a user manual for the Zumo than Garmin.
I am not very familiar with the Zumo (have an older streetpilot) but someone else pointed out that the "Honda" Zumo has some different menus from the regular Garmin Zumo. For instance, it can plot the location and signal strength of the GPS satellites (common to the streetpilots) and also the telephone menu is said to be different (besides the use of Kanji :D )
Satellite menu.
Telephone menu.
Don't know if there will be a special Zumo mount for the VFR as there was for the Streetpilot. Interesting however that the Honda Zumo has different firmware from the original Garmin Zumo. Not sure if BWM has a different firmware in their navigator III (Garmin SP2720). It does come with all BMW dealer loaded into the map data.