I modified my RAZR dock to support the HD. Opened it up and pulled out the charger and removed the HDMI pass through. The micro USB for the dock is shrink wrapped. I just bent it over and turned the phone on its right side. Works great. Audio still passes through and now it will work on my Bionic.
Here is the modified dock. I used electrical tape just to mount the dock to a CD from drive top cover, bent to angle the dock for better viewing. Does it look like crap hell yeah. But the dock its self doesn't need all that just the connector. It runs inside the dock to a small board with the USB and audio out processor.
Use the code "ACCESSORIZE" for a nice discount and standard shipping is free.
I did see a few comments from folks who suggested using the vehicle dock at home and others saying the phone was harder to answer if it was connected in the Flip Stand. We'll see.