I am certainly interested and have already has several friends ask me if I was planning to use it once it is rolled out. I am seeing more interest in this than on previous efforts. Look they are trying to revive MySpace. Personally I am more into Facebook than Twitter. Twitter just makes me feel like I am talking to no one at all. Plus none of my family, friends or co-workers will even sign up for Twitter, but they are interested in Google + go figure.
It is rare to happen, but I think Mem maybe right that this could take away more from Twitter than Facebook.