Genma:TheDestroyer
Arcane
Here's a slightly more in-depth look at the New Vegas factions, including some of the minor ones. Kinda wish it was possible to help foster one of the minor groups into a big player, but that'd probably make way too many variables.
http://www.youtube.com/watch?v=dkALhh82JdI
http://www.youtube.com/watch?v=dkALhh82JdI