Check out Mike Chenoweth's Digital Slate on the VASST Veg sharing site. This thing rocks! Over 50 tracks of generated media. I think it's the biggest composition I've seen. http://www.vasst.com/login.htm
Not to plug it or anything but it's a great test of how cool and versitile generated media is in Vegas. Some of process of building this was slower in Vegas than perhaps bringing in other image files created in Photoshop but Vegas is such a great animating tool if you're willing to spend a little time getting to know how it works. I'm trying to figure out another project where I could go 70 - 80 tracks deep.... :) Another really impressive .veg file at the site is the VegasMan, done like the popular ansi walking man .gifs you see floating around. Keyframing hell this was, I'm sure of it.