there are a number of different "bluetooth" hands free units out there.
i have installed a few variations of the "parrot" all seemed like nice technology, along with units for pioneer/panasonic/etc.
clarion has released a new simple radio with built in bluetooth, sd card slot, am/fm, and aux in, i'll be putting one in my 911 very soon as all i use is my sirius stiletto for audio. retails for less than $150.
http://www.clarion.com/us/en/products/2008/audio/source_units/bluetooth_sd/FB275BTB/us-en-product-pf_1172385079386.html
