The Windmill talk was given by Adam Christian. It is an IDE for testing websites in various browsers. It allows the developer to build, record and edit tests. The playback and debugging is done in the IDE. It can launch Firebug in Firefox or use Firebug-Lite in the other browsers. It also has a DOM explorer.
Windmill uses ipython for running and debugging from the command line. It also has a Python Proxy API, which could be pretty cool. He ran a few videos which demonstrated how Windmill does its thing, but the text was too small to read. Hopefully Christian will put his videos online. For one thing, you can export the error reports into something that is compatible with JUnit. While I didn’t get much out of it, you might. Give their website a look over at least.