Roweis gave the NYU Computer Science Colloquium, and he spent about 3/4 of it on Astrometry.net. The talk was great, as were the questions at the end; they were totally different from the ones I get when I talk about the project.
Lang and I have found some high proper-motion, very red stars in the SDSS Southern Stripe. Zolotov and I spent some time talking about what they might be useful for, and what follow-up to do. They appear to be halo stars, because they have small parallaxes, which means they are moving at very high linear velocities; they may constrain the total mass of the Milky Way.