If you haven't seen Wordle yet then I would encourage you to
pop over there and check it out! Really cool idea and I can't wait for an API. In the meantime I wrote a simple and quick User Control and a Widget to display the most recent Wordle by pulling the Atom feed and grabbing the image. You
can see this in action on my blog as well as download the code for your own blog.
Wordle Widget for BlogEngine.NET