You HAVE to try this...Gliffy

If you need occasional drawing type output and don't have the bucks for something commercial like Microsoft Visio... I've used it more than once and most people don't know the difference... (!)

" Gliffy is easy, free, and fun!

• Diagramming in your web browser without downloading additional software
• Desktop application feel in a web-based diagramming solution
• Add collaborators to your work and watch it grow
• Link to published Gliffy drawings from your blog or wiki
• Create many types of diagrams such as Flowcharts, UI wireframes, Floor plans, Network diagrams, UML diagrams, or any other simple drawing or diagram"

www.gliffy.com

(Could someone please try if under OSX? Thanks in advance!) SDA

Update: Seems to work fine using Firefox on Mac OS X - Douglas

Previous Mentions on WelchWrite.com:

Web Service: Gliffy.com - Create and share diagrams online