There are lots of ways of building the movie, but the easiest and most straightforward I've found is to use Quicktime Pro. It's relatively cheap compared to the heavy hitting motion graphics apps like Adobe After Effects, and seems to work well for this application.
Just resize and assemble all the stills in a folder and select the 'Open Image Sequence' and choose the first image in the sequence in the resulting dialog.
You get a prompt for what frame rate you wish to use, then the sequence opens and you can test the sequence before saving it. Once it is opened, it can be saved in a number of formats.
If you are having trouble opening the second movie I posted, it may be something to do with the Quicktime version. There was a security update for Qucktime that I loaded between making the two sequences - I'm currently on 7.3.1
Mike