Free On-Line Diagram Creation and Storage

According to Tom Mighell at http://www.inter-alia.net, the free, "Gliffy [beta website at http://gliffy.com/] will help you create diagrams of just about anything, including network schematics,floorplans, even basic shapes. It has lots of customization tools, and withthat great Web 2.0 feel it's very easy to use. Collaborate with others on diagrams, and when you're done you can save it to a JPEG. "

Tom also points out that "the number of online storage sites has proliferated geometrically this year-- here's a site that introduces you to 90 of them: http://snipurl.com/ud30."