Just noticed this over at Simon Horwith’s Blog:
It’s a pretty robust on-line diagramming tool, all done in Flash. In addition to UML, it does flow charts, network, UI, and floor plan diagrams, as well as generic shapes and uploadable or searchable images. Your diagrams are saved on line in your free account. You can print them, publish them to the web, or export them as SVG, JPEG or PNG. It’s a pretty impressive RIA. And looks like it’s all Flash 7! Nice work.