I have the source code for the demos – I will zip that up and upload it here shortly.ernet
Update 2…I have posted the source code from the demos on my skydrive…it is a zipped Visual Studio project with a web template. To use this, create a site collection with no template, deploy the solution, and create the site using the SharePoint Saturday Demo template in the custom tab. Or, deploy the solution to an existing site, and create a new subsite using the custom template. You’ll need to create some sample data before running the demos.