I haven't seen any more details on a possible ride organized by the SBL but I did see this blurb on one of the other websites I visit:

The L5 Flyers/Aarons Racing Team are planning a Hurricane Katrina relief ride on Oct. 1. Preliminary details can be found here.

It looks like the L5flyers are teaming up with Emory to put this on and the ride will start somewhere on the Emory campus.