Playing With a Thumbpick

This is a 1.75 minute video response from DJ Phillips on Sep 15th, 2009

Question:

"Quick question, I've noticed that some really good guitar players will play with the thumb pick, from Nils Lofren to some of the instructors at JamPlay. I am trying to change up my style by learning how to use the thumbpick for some country and bluegrass music. Does JamPlay have any lessons on techniques for using the thumbpick such as exercises and hints? Thanks, Ron Terranova."