Hey molders,
I use this: http://www.echoproducts.com/echoaccessories/echopluggo.html for cell phone mount on my handlebars. I ran a fused wire from the battery to the supplied lead. It charges my iPhone while I listen to music and use the turn by turn navigation. I listen through a Chatterbox communication system with spreaders in my helmet. Rarely have taken a cell call while riding but can easily.
Carry a zip lock plastic bag and rubber bands in case of rain