Nick Berardi asks:

It was pretty easy, I used some code that I modified from the original SquishySyntaxHighlighter component written by Adam Sills. The original code uses lots of [span style=] tags, and even uses javascript to collapse/expand #regions if you're using code written from Visual Studio.NET. I modified it to use mostly [font] tags and 86'ed the javascript, so it would show up in an aggregator better.