Something of interest came up on my tweetdeck this morning. I followed up on the links and found that it is not available to everyone yet, but the beta-testing is going on as we speak.
I think Google Wave will really be worth a look. There are so many interesting ways it might be used to connect people. We have been using Google Docs to collaborate on documents and archive them in a common space. Google Wave takes this into another dimension. I am asking myself how it will be different from many of the social networking tools. Google Wave might be really useful for learning networks.