I am following 926 people, I have 2,576 followers, I have tweeted 6,440, and I am included on 180 lists. I use TweetDeck on my computer and iPhone to keep up with my Twitter stream, mentions, direct messages, as well as certain hashtags. I currently have 12 columns tracking things like #comments4kids, #elemchat, #jppss(the district where I work), and #ISTE11 to name a few. I change columns to follow what is going on at conferences such as EduCon, ICE, Reform Synposium, K12Online Conference from time to time.
During the past year I got to spend time with some of my PLN (personal learning network) members at Estes Park, Colorado before we all headed over to Denver for ISTE10. I was able to get a ticket to attend TEDxDenver ED thanks to seeing tweets about it. While at that event I won a PolyVision Eno interactive whiteboard. I presented online for the K12 Online Conference because of Twitter and was invited to present on Classroom 2.0 Live which I attend most Saturdays and tweet about each week. I was invited by @bethstill to be part of a panel that will present at ISTE11 this year in Philadelphia. Thanks, Beth.
My students and I have connected with over a dozen classrooms so far this school year via Skype. Lots of those connections were started on Twitter. Read about some of those connections here and here.
If you are a new educator to Twitter you might want to check out this LiveBinder by Steven W. Anderson (@web20classroom). It contains lots of helpful information. By the way Happy Twitterversary to my friend, Steve. He and I share the same start date.