Creating a Personal Learning Network with Web 2.0 Tools is a site that helps teachers set up and create a PLN. It has information and resources from multiple teachers and includes a variety of resources for teachers to use to connect with other educators. The site was created as part of a presentation for FETC 2009.
I'm a huge proponent of PLNs and this is definitely a great site to use to create or expand your own PLN.
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http://educationaltechnologyguy.blogspot.com/p/create-personal-learning-network.html