Currently working on a startup.
Previously, I worked at Metaweb [metaweb.com].
I am an AI guy. I invented Amazon's "customers who shopped for this item also shopped for..." recommendation system. You can see the system in action by looking at any electronics product on Amazon's site.
Before Amazon, I worked with Brewster Kahle at Alexa Internet building the Related Links recommendation system for Netscape (the "What's Related" button) and IE (the "Show Related Links" menu item).
Before Amazon and Alexa, I was one of David Waltz's graduate students at Brandeis, and spent a year as a visiting researcher at Thinking Machines working with some very bright people on massively parallel computers and applied data mining.