I just picked up a 3 piece accessory pack at Costco for $39 which included a car mount, really nice car charger and a night stand charging cradle.
This is a really nice set. I live in WA where you can be fined for using you car phone without a headset so I put the car mount on the driver's side window, upper right hand corner. The mount does not obstruct my view at all. Then I use speech to dial calls such as "call home". With the speaker phone, the sound is great both to and from the caller. Also you can navigate use speech. Just say "naviagte (address)". It pulls up the map and gives turn by turn directions. Being on the drivers side and up close, the map is very readable.
Love the night stand clock/alarm/charger. I listen to a little jazz before going to bed then just switch back to alarm clock.
All in all a great investment. I just love this Droid!