This is a cool tool. We have been forming political parties in our class and the children have been writing policies. Wordle creates a word cloud from any pasted text or you can just drop in a URL and it will go get the text for you. The more frequently a word appears in the text the larger it is on the cloud. In playing around with it I have dropped in the Labour party education policy and the National party statement on National standards. I would have preferred to compare two policies but it seems National have not released their policy yet. It isn't hard to see which is which. I'm going to get the class to do this with their own policies. Makes for an interesting comparison.
Try it out with your school website or your own blog and see what your text looks like.