OEM Verizon Motorola Droid PREMIUM SHELL HOLSTER COMBO - eBay (item 150400155254 end time Mar-24-10 16:26:42 PDT)
I purchased this (click link above) case off eBay, and it works great. It comes in 3 pieces; one fits around the top part and one fits around the bottom of the phone. The 3rd piece is a holster with a clip to carry the phone. It offers complete protection for the edges on top and makes the phone feel very secure.
The case is a perfect fit and does not interfer with the sliding of the phone. It looks much better than the eBay picture and offers significant protection if dropped. Any of the three parts are worth the $11.88 price. Shipping is free and you get quick delivery.
It fits in your pocket very nicely without the holster. I don't think it will fit in most docking stations. There are some good pictures of the case at the bottom of the eBay ad.