At this weeks WebTuesday in the AdNovum offices in Zurich I presented node.js, the much talked about framework for writing event driven servers in JavaScript. It's an interesting approach to develop asynchronous applications with completely non-blocking input/output without the headaches this usually involves. From our perspective it's especially an interesting tool to develop the server side of Comet-like applications in a language that most developers are already familiar with.
You can find the slides containing an introduction to event loops in general and a few code examples on slides.liip.ch.