Here are two Glogs created by @MZimmer557
His blog is filled with amazing tips that every teacher interested in technology should read and have fun with in class. He is a great resource on Twitter and had shared wonderful ideas that I have passed on to you. Check out his blog and follow this man on Twitter.
One is a collection of videos on how to use some Web 2.0 Tools and the other one is about using Twitter. Take a look at these and see how they might help your classroom.