I thin I'll try to make it this year. The last couple of years I have been unable to ride. There are many folks around town who do ride this and I can put you in touch with some of them if you like. Or you could go to Cahaba Cycles empire and ask anyone there and they can help.
Many companies in the area have "teams" as well as just folks banding together, getting "team" jerseys and going down.
The BBC Tuesday night world's from the Gardens is a good place to find 150 riders in person and get on a ride email list.