Digg.com is a great tool for spreading the word about the conference. I just wish I thought of it weeks ago. I know from experience that my own site jumped in traffic about 150% when a video I did was mentioned on digg. Sooo...
http://digg.com/scie...scuss_longevity (For the direct link)
http://digg.com/science/digg (For recently dugg items in the science category)
Go there and click the "Digg it" button. Enough clicks and it will be promoted more. I think it takes a few dozen to make it to the front page of Digg. You may need to sign in to be able to 'digg it' however.
