Vehicle/Car Mounts
I have use ProClip for the mounting hardware for just about ever phone or device that I have owned. They do have mounts for the TP, but you have a choice of either opened in horizontal or closed in vertical positions. Both with tilt and non-tilt configurations. If you are looking for a good solid solution for mounting I would go wiht ProClip.
http://www.proclipusa.com/
I am aslo wating on Seido to come out with a charging/speaker mount as well. We will probably see a solution from them in about a month or so. Seidio also has cables, batteries and other accessories that I have used as well without any issues.
http://www.seidioonline.com/
edit: Just noticed a few posts about Seidio already. Sorry for the duplicate information.
Thought I would throw these two out there as well.