This is a great blog with contributions by many famous non-fiction authors (for kids). This particular entry by author Loreen Leedy does a nice job of explaining pinterest.
In the middle of the page is a power point with 51 ways to use Wordle. I liked it because it gave me some ideas on how I could use it. Used with root words, maybe animals.. (rec by Melissa Fitzgerald)
AASL's list of the best websites to use with students. Be sure to check out the other years as well, including landmark websites, sort of a "Hall of Fame".
Great session by Hella Rumschlag and Laurie Loughery of Mohawk Trails Elementary. Their project involved collaborating with schools across the country using various web 2.0 tools