wordle.net (click: @) is a nice tool for generating images of those word/tag clouds you see on blogs. The higher the frequency of a word in a given piece of text, the larger the font. I tried it with a couple of C source code files..

From Jasper's monster moving code:

[img4=/bimg/jasper_wordle.jpg]

And from Chocolate Castle:

[img4=/bimg/choc_wordle.jpg]