I've been a member of LM_Net since about 1992. It was my first online PLN even before the term was invented. A PLN has been a big part of my professional career. I've written about them here, here (with Dr. Joyce), and here for admins.
Click here to read the rest of the article: http://doug-johnson.squarespace.com/blue-skunk-blog/2013/12/10/what-tools-do-you-use-to-maintain-your-pln-librarians.html
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