JCO in iPhoto '09 Slideshow

I'm liking the slideshow themes in iPhoto'09. My problem is that I need to learn about video formats for different purposes (MPEG, .MOV, h.264, frame rates, oh my!) Here's my first shot to see what the default exports look like.

I'm sure all the export settings will be different for web use, DVD and computer use...but that's all a new language to me. Guess I've got to hit the books...or Wikipedia.