The summit will beheld for two days in two places; the east coast of the US and London, England. Interested speakers can submit papers to speak at one or both conferences.
I don't see the dates for the 2007 summit anywhere yet, but the first one was a pretty decent success and the list of sponsors for the 2007 summit is pretty impressive.
Two quote Anita "If you have something to say worth listening to, I want to hear aboout it". Paper submissions can be made here.