Someone else may do a more formal announcement later, but since early registration expires on August 20th, I'm doing a quick heads-up to Less Wrong readers:
The Singularity Summit 2009 is in New York on Oct 3-4.
There are discounts for students, blog mentions, referrals, and registration before August 20th.
Speakers of note to rationalists will include Robin Hanson, Gary Drescher (author of Good and Real, one of the few master-level works of reductionism out there), and David Chalmers. Also speaking will be Marcus Hutter and Juergen Schmidhuber, as well as some of the usual suspects: Aubrey de Grey, Peter Thiel, Ben Goertzel, and Ray Kurzweil.
They're really trying to raise the intellectual level this year.