Here's a suggestion for the conference. Find Bitcoin detractors and let them debate the issues with members of the Bitcoin community. Find an economist who thinks Bitcoin is a pyramid scheme, give him a platform to expose his ideas, then have him debate them in the open with someone from the Bitcoin camp. Find a tech guy who thinks he may have detected a problem with the code and let him debate Gavin or Jeff. Find someone who believes the current monetary system is just fine, and that centralisation is crucial to a currency... you get the gist.
We need to open this discussion a bit. The rest of the world sees Bitcoin as a hobby, largely because the Bitcoin community is closed and has a definite proselytising slant to it. A sophisticated, high level argument will only benefit us in the end.
Cheers,
+1