If you guys are ever in Georgia, you may want to have a go at the Six Gap Century in North Georgia. Taken from their web site at:
http://www.dahlonega.org/aboutus.asp?id06=124&par06=23

"The Six Gap Century
This ultra challenging route takes you up down six of the steepest climbs in the North Georgia Mountains. Test your stamina with more than 10,700 feet of vertical climbing over the 100 mile course. Elevations for the six gaps in this ride range from 2,949 feet to 3,490 feet. The toughest climb, Hogpen Gap, tests even the toughest riders, averaging a 7% grade for seven miles, with sections as steep as 15%. "

In April some of the Tour de Georgia takes place there with famous riders participating.