THis blog entry gave a wider breadth to a pln than I had considered. Until recently, I had considered PLN as social bookmarking and not much else. There are a lot of other areas to include.
Love the post, thanks. You are so right. there are many components to PLNs that it can get overwhelming. I constantly look for ways to combine them all so it is easier for me to manage. I have been able to connect my Diigo with my LinkedIn profile, TIE, and Classroom 2.0.