There have been several animation plugins created for Sketchup but they have been less than ideal for a lot of presentations for a number of reasons, mainly in their ability to create complicated movements.
Fat Pencil Studio has been testing the plugin and has created some interesting animations which seem to demonstrate an animation plugin that could be very useful for film-related work, both previz and set design. The plugin is not based on the native animation mechanism in Sketchup and thus seems to be much more adjustable to the needs of the designer. Here is one of the animations from Fat Pencil. Go here to see all of their work.