At DrupalCon in Boston, during my presentation on Media Mover and DruTube, there was someone (forgive me I forgotten your name) that was asking for multiple thumbnail generation from a single video file. I've built out the Video Thumbnailer on the Media Mover platform that does exactly this- you can define either how many or how often you wish to create a thumbnail from a file and when Media Mover runs it does the conversion for you and appends it to a file.
For people doing video reviewing or who want to provide an image based solution for non-flash based browser (iphone ) this could be a handy solution. If somebody wants to build a gallery from this, it should be super easy.
Check out the demo here.

