I think the product has already proven itself to be valuable...
I dont miss it. There are a few email addresses on there that I wish I had written down, so I guess there is some value, but is that value worth the wasted time getting sucked up in a live status stream (or worse: Your data in such stream)? Looking and commenting on peoples wall? Gossiping? Its a trashy medium, just like the tabloid medium before it, only with different recognizable people and with your life on display as well.