Hopefully TN State Sen Marsha Blackburn will be joining these guys in DC next year. She is a tough anti-tax, cut spending statesman. She is the GOP canidate for Rep Ed Bryant's seat.
According to Blackburn's web site she received an endorsement from the Club for Growth. I've heard that they're very effective at getting Regan-style tax-cutting conservatives elected.
Their web site lists a lot of their accomplishments, and I think I'll donate if it's not too expensive.