You might try reading Dore Gold's book (former Israeli UN Advisor and current lecturer for the Jerusalem Center for Public Affairs.) The name of the book is "Hatred's Kingdom", and is the most thorough research that I have ever read on Wahabbism.
sounds interesting, I've certainly know that name, I'm game
someone mentioned other radical sects, I believe the Deobandi are the Wahhabis of India and just guessing, I'll bet they had a profound influence on Islam in Pakistan