Watch the Our Man online guitar lesson by David Hamburger from New School Fingerstyle
Fingerstyle guitar's gotta have that snap. The one where you roll your right hand thumb under the string, brace the first joint against the face of the guitar, and pull up. The string slaps against the frets, and there you are. Very dynamic, lots of impact and color. I learned about this technique watching Roy Book Binder play. I love his record Bookeroo, on Rounder, and his DVDs on Homespun offer a lot of insight into his style.
Reference Source: Roy Book Binder (http://www.roybookbinder.com)