Developing Web Apps in Lisp
If you've ever been curious about what a typical Lisp development environment is like, or about how a Lisp web programming framework would work, here's a great video (torrent link) for you.
The video shows off a number of cool things. First, there's SLIME, the most advanced Emacs mode for Common Lisp development. It's got several IDE features that make Lisp programming far more comfortable than it would be without them. Second, there's UnCommon Web, a Common Lisp continuation-based web development framework. It looks to be pretty nifty for web apps that need control flow.