Intro to Firebug Screencast
A couple of weeks ago, I made a short-ish screencast about some of the basic features of Firebug. I plan on making more of these in the near future highlighting some of the features of Firebug 1.5 and some of the other, lesser known things you can do.
Right click and download in .ogg. or .mpeg4 to see the video in full-size.