Windows Movie Maker and DVD Maker SDK released...

We've released an SDK that lets you extend the Vista versions of movie maker and DVD maker, though I should probably note that it's not a terribly simple thing to do.

Here's the blurb from the download page:

This SDK is helps you create and add your own custom special effects and transitions to Windows Movie Maker in Windows Vista, and your own custom transitions, buttons, and menu styles to Windows DVD Maker in Windows Vista.