That's sort of what I'm considering doing..

There are several manufacturers out there that are starting to dabble in bluetooth integrated helmets, or if all else fails, it's easy to integrate bluetooth capable speakers/headphones into the lining of a helmet... Chatterboxes (communication devices, obviously) offer bluetooth functions for your cell phone, mp3 players, etc..... I think, if not already, Valentine One is going to have a bluetooth capability in the near future. That will be a great option. You couldn't see the main radar unit at all if it was mounted in the ram air duct.