Wow.... may be visio killer... I read about that site from readwriteweb. Gliffy is a online Diagram software like visio. I think, it's written by JSP. It's can make like Visio. We can draw UML, Flowchart online without install software in my computer. I can't find visio like software in Ubuntu. I am so worried about that. Now, I am happy about Gliffy because I can draw design in Ubuntu. So, it's a pretty news... that a Web 2.0... I like it...