Just downloaded it. Seems like it's picking up the GPS location almost immediately instead of having to wait for it Have to play with the layers function and see how it works.
New version caches your state better even after to exit the app. So Lattitude is a layer that stays selected even after you exit the app and come back in (whereas before you had to keep reselecting Latitude in the menu)
But I have logged in on the BB, and have My Maps working on the PC. On the BB is says "My Maps is not supported on the account". But clearly it IS!