Did I mention building web services in ColdFusion is too easy? Important to avoid query results and keep everything to arrays and structures -- Flash plays nice that way.
In keeping with the whole Web 2.0 nature of the conference we're making the web service available to anyone who wants to play.
webDU Web Service WSDL
webDU Web Service Documentation
More details on the Flash Lite application when we have them. We've got some great Flash Lite content for the webDU conference this year, with sessions from Dale, Bill Perry and Chris Blair.