Fun? Video chat? Google Wave? That's right, the Wave is not just about collaborative Wikis and seeing what the other person is typing. A really interesting feature of the platform is the ability to add extensions, one of the first of these is 6rounds, an extension that plugs in a full video chat facility to the platform, but not just that, it also provides the ability to perform tasks together. Interestingly, the extension has its roots in Speed Dating, but it looks like it has a great deal of potential, and like many Web 2.0 applications is built using open source technology.