I've had a chatterbox (FRS) for two years now. The first year I had it mounted on my helmet. It worked okay but wasn't as functional as I'd like. So, this year I mounted it on my handlebars. It is so much more useful there and I only have to deal with one wire coming to my helmet now. I almost always have my MP3 player hooked up (which is also a satellite radio); Gives me something to sing along to on those longer trips. And, with the volume control right in front of me I never have to worry about it being too loud and not hearing my surroundings because I can easily adjust for any riding situation.
My only gripe with the FRS is I can't plug my cell into it. I don't plan on having real extended conversations while riding, but it woudl be nice to be able to answer the phone and see what someone wants, or where we're meeting up. I'd also like the phone capability for calling and asking directions (I don't have a GPS yet), or just to make a quick call saying, "I'm on my way home." I've been meaning to upgrade my chatterbox so I can use my phone too, but I wanted to wait until the bluetooth version was released (June 2007) and now it's a matter of funding.
2003 Kawasaki Z1000: 11.886 @ 117.72MPH