This may not appeal to everyone, but with all of the PowerPoint-to-Webcast and streaming video projects this website really got my attention!
Select a movie clip, then select any of the main Flash streaming formats and see a side-by-side comparison of the quality. A really good example is On 2 Flix Flash 7 (first real streaming encoding software I used) with the newer On 2 Flix Flash 8 (which I use extensively and Camtasia Studio uses as its encoding engine).
A bit geeky, but very interesting! Click here to go to the Flash Video FAQ.
– Troy @ TLC