How to get started with your PLN:
Leave comments on teachers, and students blogs. If you find them particularly interesting look them up, read what they have to say, and contact them using these sites:
Twitter, RSS Feeds, Blogging, Podcasts, Classmates, Teachers, Email, Youtube, Delicious, Evernote, Glogster, and Skype
Never be afraid to google a topic, which may lead you to a site, classroom, or person that you can add to your PLN.
Watch this Youtube video made by a 7th grader in Wendy Drexler's class. She calls her has a PLE (Personal Learning Environment), which not only encompasses the people in her PLN, but also research and production resources.
*I recommend watching it in full screen so you don't miss out on the details!
Here are some great resources for finding teachers to follow...
Larry Ferlazzo EduBlog
Beth Still EduBlog
Connected Teachers on Google Docs