I’ve been looking for a way to create custom transitions for the Apps I’m writing for Windows Phone 7 and came across this informative post and video. Where they describe how to create custom transitions for per page navigation. The only issue is it hasn’t been updated for the Beta release. So I took 10 mins (with the help of ReSharper) to upgrade it to the new Beta, so others don't have to go through the work. I’m not sure if its my machine, but the transitions in the emulator looked a bit sluggish, however I tried them out on a device and they seemed smooth.

FindAZip-CustomTransitions-Beta.zip