There are many tutorials in the French part of the Tutorials tab that are excellent. The latest one contains 2 videos that are quite astounding.

The first one shows how to use multiple white rectangular masks and create PiP's with moving, fluid, effects-laden transitions. I never thought to use the effects on the masks quite like Sergio does in this tutorial.

The second one shows how to animate lines using the Echo effect amongst others. The lines can move any which way and can be multi-coloured. Quite amazing. It also shows how to animate lines on a map to trace routes. This is one for Terry Pinnell to watch.

Enjoy!