The Teacher Chronicles has two wonderful sites. Go here for the first one which is a great resource for those interested in using the computer in the classroom. It is quite a large collection of articles and ideas about using the web to further the learning experience. Worth checking out.
The second great site using the same The Teacher Chronicles name is a huge resource specifically aimed at using web 2.0 software and what all this great software can do to help you make the classroom more fun. Check it out here.
I found the link to all of this on another great site called Free Technology for Teachers.