Got a Jabra Cruiser for mine. It clips to the visor/overhead console. Works alone or through your car radio.

Cool thing about it is you can listen to iPod/Pandora music on your phone over your car's stereo system.

http://www.jabra.com/Sites/Jabra/na-us/Headsets/Pages/JabraCRUISER.aspx?productfamilytab=Overview

It was about $100 IIRC. I figured it'd be a lot cheaper than a ticket in the long run.