The above graphic is a word cloud. A word cloud is a representation of words and their frequency of use. Words used more frequently are bigger and bolder. Above is a word cloud of the last dozen posts on this blog. It's very interesting to see what words I use the most. (It looks like I focused on podcasting a lot lately.) You can generate a word cloud for any blog by entering the address of the blog's RSS feed into the Interesting Words page. Pretty slick, eh? I've been showing teachers and students word clouds of their blogs at Willowdale as a way to analyze their writing.
If you are really digging word clouds, you could purchase a t-shirt printed with a word cloud from the blog feed of your choice from Snap Shirts.