I am always looking for more PLN links! I started a site @ http://www.vrml.k12.la.us/curriculum/tech/socialnetwork/PLN.htm
last month and would love to continue adding to it.
Barbara Sakamoto's "What is a PLN Anyway?" blog post is great for anyone new to any educational PLN. Her link is located @ http://viigo.im/0QxX
.. You may want to check that out if you haven't read it yet.
If you have any informative PLN links to share, I would love to add those! Just send them my way!