First, a big thanks to HaTax for providing these! It's what "community" is all about.
I've used the 7100 and 7130 versions on my VZW 8130 with my BT Freedom 2000 Keychain puck. Both versions have worked great - all features and functions are available.
The major difference I've found so far between the 7100 and 7130 versions are the two that HaTax notes above, the icon improvement and the availability of a route itinerary in the 7130 version. Other than that they appear to be very similar (possibly exactly the same).
The first time you launch the program it will ask in two dialogs to provide permission to access phone resources (both dialogs have a "don't ask me again" options) and Mapquest will register you to the Mapquest server. You are not asked to provide any name or personal information or fill in any forms...it just connects and you're good to go.
When in the app you access main screens via on-screen buttons and BB key menu options. On screens in Navigate and My Places you can get to additional related screens via right/left trackball or the BB button.
Navigation is quick and accurate, and rerouting usually works quickly on the fly when you go off-route. A couple of times when I intentionally took a different route to test this, Mapquest was a little insistent about me going back to the original route, but it did reroute and take me along my desired route when I ignored its requests for me to make a legal u-turn.
You can force a reroute if you want to.
You can maintain a list of places in Mapquest, but there is no integration with the BB Address Book, unfortunately, as with VZNav.
Mapquest voice commands can not name streets, so you get "turn right," and "turn left," etc.) but it does name numerical freeways (e.g., "Take I-405 North"). The voice prompts give you plenty of early warning and are very clear.
I agree w/HaTax - the Night Mode on the navigation page is very cool and one of my favorite features...changes screen colors to black and dark blue w/white text, very easy on the eyes - you'll feel like you're piloting a stealth fighter.
I've been very pleased with Mapquest...I like it much better than the two free options I tried (Nav4All and Amaze GPS). Enjoy.