I was playing around with the new Google Wave application. I believe this is something the OU's SocialMe project wants to achieve, too. Its a convergence tools for any kind of collaboration i.e. meetings, brainstorm, organisation, synchronous or asynchronous. Similar to Google Docs, you can edit a document, which they call Wave at the same time others do. The same Wave can be used as a Chat by simply replying to a statement.Or you simply highlight a term or picture and start a conversation on this item within the document. And it is similar to Gmail, in that you can see all Waves in your inbox read and unread, and you see who is participant in this Wave, you can save it on folders and so forth.
Have a look, its quite amazing.
We should add this to our recommended list for U101 collaboration tools. Unfortunately, this might be too early for the first presentation as it is only in preview stage.