Facebook's Subscribe Button & Public Social Networking

It's been fascinating to watch the to and fro between Facebook and Google +, as the two products vie for social networking supremacy. As you'd expect, a strong challenger (Google +) has forced the current social networking world champion (Facebook) to make some defensive moves. Facebook made two big changes this week: automated friend lists and a new subscriber button. In a series of posts, I'll be analyzing this intriguing battle in more detail - because it's changing the social networking landscape significantly.