Essential Line Dances Volume 2 (Shawn Trautman's Learn to Dance Series)
The dances Shawn teaches in this DVD are definitely some that you'll need to know.  The Watermelon Crawl, One Step Forward and Bump In The Dark all are excellent, yet they have completely different looks about them.  The instruction is easy to go back and forth through and the main menu is very catching as it shows clips from each of the dances.