Jumped to Yammer

I've jumped from iGoogle to Yammer but I will explore more fully the other segments over the next few weeks. Time to explore the topics has been an issue for me as I need to get my head around some of them and see their relevance to library service delivery. I have done some of the readings and had a brief look at all of the topics but not completed them. Some are more instant so I've just signed up with Yammer and received a couple of messages. I need to use it more to find out its potential and if it gives us more than just using email to communicate. Its a bit more visual and "out there" but does it supply anything extra?