My Droid has a cool car mount. I screwed a 1/4" thick disc of acrylic over the GW emblem. The car mount has a suction base that I attach on the disc.
I made a custom cord to connect my phone directly to my wired helmet. It sounds fine parked in the garage, but I don't think it will be loud enough on the road. I can also use the earbuds that came with the phone. Looks like it is going to be a while before the ice and snow melts off so I can road test things.
The bluetooth would be real nice (no cord), but I am not ready to give up my original connection to the Honda radio, CB, and intercom. I guess a second helmet with bluetooth would solve that problem but not ready to spend that much.
Would you post the link to where you got your rain cover?
Thanks,