We developed a very complex screensaver for Mac OS X called Screensaver Ninja. It displays websites. The goal is to turn idle computers into dashboards, which would sort of mean that you can participate in this jam with a web site? *wink*
We were thinking of maybe releasing a free lite version that can display only one page or something like that. I'm not sure if we can have it in time though.
Is there anything we can do to help? You can reach me at email@example.com and us at firstname.lastname@example.org.