François,
Your projects are all nice and interesting, but I'm not sure they fit well with the philosophy of the BlitzWeekend event. The goal is to create and demonstrate a "product" idea (whatever that means) in 48 hours. (Not that I agree that this goal is a realistic on, though.)
But the event can certainly be a nice opportunity to team up with other Scheme developers and build something, even if its not a product per se. I just wanted to stress the focus of BlitzWeekend.
Dominique
I have ideas for a few possible Blitz projects, all related to current interests. I've done a lot of Python in the recent years, but would like to find ways to get a more solid contact with Scheme. So, my projects are mixed in nature, and because Scheme did not fully recover its place in my neurons, I surely need complicity of other Schemers. ...