Every time I think I am getting close to expert level with Vegas, I see some tutorial or example by someone like D. Eric Franks, Douglas Spotted Eagle, Jeffrey Fischer, John Rofrano and more that makes me crawl back to the edit bay with my tail between my legs to practice some more. Vegas is super easy to use and you can do amazing things with it, but it is very feature rich and if you venture into some of the advanced places you will amaze yourself.
Just a couple of examples:
Height Maps: http://digitalproducer.digitalmedianet.com/articles/viewarticle.jsp?id=141417
Difference Masking: http://www.sundancemediagroup.com/articles/dayvids/difference_masking_in_sony_vegas.htm
