+1 for the Scala Rider Bluetooth! We got the "Team" set so that my wife & I could talk normally while riding. We've been able to communicate for the last 30 years, but the intercom just makes it easier. We've done 10/12 hour days with no battery problems & fairly heavy GPS & intercom use.

I was surprised how well the phone worked on a motorcycle over bluetooth. I wear an open face helmet & try not to use the phone at highway speeds, but if a call was important enough I could try to take it, or pull off to talk. Up to 50 or so it works just fine.