That's it, we're done for the (second) day of our hackathon. And we got where we wanted: build a non-trivial, useful website using Daisy in two days (admittedly with 4.5 people - so that's 9 real days, and we had some stuff laying on our shelves as well obviously).
The result is available from http://gardemo.outerthought.org/ - it's a Flemish demo unfortunately, but the theme is a gardening company. It features some Google Map integration (use the GMap widget to select the location of a garden project), and a rather full-featured iPhone skin.
Kudos to everybody involved!