Well, I jumped off and bought the Parrot. Here's my first impressions:
The kit includes the main unit which is a disk about 2.5" in diameter that slides into a clamp that clamps onto your helmet. When all this is connected, you have a hockey puck sticking out about 1.5" on the left side of your helmet.
The puck has volume up & down buttons, the on/off button, and a usb port that acts as the charging port and a place to plug in an analog device such as an MP3 player or CD player. A cable is supplied with the kit that takes the output of your MP3 player and converts it to the USB plug. It also contains an FM radio, which seems to work pretty well.
You also get an AC adapter for charging, the 3.5mm stereo to USB cable, an L shaped Torx wrench (used to tighten the clamp to your helmet and remove the battery from the remote), and a remote.
The remote is a spring-loaded and just slips over your grip and gives you access to the volume without having to remove your hand from the grip. BUT WAIT, THERE'S MORE! If your using the builtin FM radio, you can move between stations using the remote. There's also a "Source" button on the back side that lets you select between radio, telephone, and Bluetooth audio. This remote also let's you set the device up.
There's an audio menu that you scroll through using the remote. You can set the headset to stereo mode, mono mode (even which speaker you want the audio to come out of), stereo widening, enhanced bass, and automatic volume control.
It paired really easily with my 2G iPhone and we even paired it to a 3GS with no problem. Once sync'd up, the unit will download your contact list from your phone (evidently, not all phones will do it automatically, but the iPhone does). What this does is allow you to voice dial anyone on your contact list. Your phone doesn't need to support voice dial for this to work. One thing I noticed was that you have to say the names in the order you have them sorted. In other words, my list is sorted lastname/firstname, so when I tell it to dial, I have to say "smith john cell" instead of "john smith cell".
When a call comes in, it's announced: "Call from John Smith". You then have the option of saying "accept" or "decline". You can also press a button on the remote to accept the call.
To get Bluetooth from my 2820 to the Parrot, I had to buy a A2DP dongle that plugs into the line out of the Garmin. That little device paired up without a hitch as well.
The sound coming out of this thing is fantastic.............but I'll say that with a caveat. At speed this morning (first chance to test it at speed), I had to turn the volume all the way up to hear it - and then it wasn't all that loud. Keep in mind that "at speed" for me is around 70 or 80. I'm going to play with speaker placement and also the audio settings on the Garmin to see if I can improve the volume. Add to that that I wear ear plugs.
All in all, it's a pretty good unit, but I need to work on that volume thing.
One other thing: this is NOT an intercom system. It's strictly for interfacing with a phone and music source. Oh, yeah, it'll pair with up to 10 devices.