Car dock and cases (plus extended battery)

Nothing I have seen, I don't think there is due to the fact the phone charges while in the car dock so there is no need for a larger battery.

At this time you would just need to swap the batteries when you need that little extra...

After extensive (and I mean EXTENSIVE) searching for about 2 weeks, I finally found the perfect case that will fit the TB.

http://www.timbuk2.com/tb2/products/accessories/on-strap/2way  EDIT: size MEDIUM!!

I have always been a huge fan of Timbuk2 (their products will most likely outlast me).

It will attach to a belt either vertically or horizontally as well as has an additional storage area inside suitable for business cards.  Of course it fits the extended battery perfectly as if it was designed for it.  All you have to do is make sure your phone is turned off before you holster it.

I'm still searching for a good windshield mount, but I'm still using my generic model bought directly from VZW about 2 years ago.  It holds it good, but if I run over about 20 speed bumps in rapid succession, the phone will most likely fall.  I have rotated it 90° and used Skype while driving and the person I was talking to was very impressed.  It holds it better horizontally than vertically.  Due to the design of the cradle, I cannot charge it while using it so I dismount while driving to charge it.

If you find any other accessories that are battery+ friendly, please return the favor!

FYI, you can usually pick up Timbuk2 products in a brick-and-mortar store such as Sun and Ski Sports, Whole Earth Provisional Company, etc.  Think outdoors/camping/biking.