I've done a slightly improved GeekWeaver screencast.
Still very sketchy, and without audio, but the SWF is smaller, and shouldn't crash.
It just concentrates on the basics :
* making several pages
* using the .tag notation with outline indenting to save on closing HTML / XML tags
* defining a reusable and parameterizable block (in this case, page template) and calling it for each page.
I'll try to get the next one done in a few days, with some more surprising capabilities.