Bubbl.us is a quick flow-charting web 2.0 application that while still in it's infancy Bubbl.us is a neat tool that can be used for brainstorming, setting hierarchies, flow-charting, or many other possibilities. There are collaboration features built in (just like all web 2.0 applications) and it looks like the designers are going to be looking into setting up import and export features. One neat direction that it looks like they are going to go is to allow the chart to be placed live into html, ala Google cal. This would allow for a living chart that would continuously be updated when the original was re-designed. Pretty neat.