Don't Import Duplicates??

Howdy all. I've grown to LOVE the Aperture import option "don't import duplicates." I don't like to delete the photos from my camera until I've made an off-site backup with Aperture, so this option makes importing photos quick and easy since I don't have to figure out where I left off every time I try to import new photos.

I can't seem to find an option for this in iMovie '09. I'm quickly growing tired of the arduous process of trying to figure the last movie I imported so I can start importing the very next video. What makes it more difficult is the fact that most of my video subjects are the same (i.e. our baby). This is very frustrating, as I have to wait sometimes a few minutes for all the video previews to render (I have a 32GB card in the video camera), then start the difficult task of figuring where I left off.

Does anyone know of a way to show only non-imported movies, similar to Aperture's "don't import duplicates" option? This would make iMovie MUCH more enjoyable and usable! Thanks in advance...