You might consider the system at
http://www.collettcommunicators.com/. I've used the intercom option, the cell phone attachment and MP3 player attachment, but not the bike-to-bike (with a compatible system) capability. My only complaint is insufficient volume to allow for earplugs. Regarding wind noise picked up by the microphone, I've often had to advise cell phone callers that I couldn't write anything because I'm on my bike at highway speed. They had no idea!