I just found this through Parker Palmer's Facebook posting. Go to Wordle and input a bunch of text to see how it picks the most vital words and creates a word cloud that artistically emphasizes the words that are most common. You can use any text you like, or submit your blog feed. Here are a few from different bits of text and feeds here on JE.org. Click to enlarge each.
From our podcast feed:

From our About Us page:

From our recent entries feed:

The license to use the output is pretty liberal. We could use the random designs as the basis for outputting to any media we like, maybe T-shirts, mugs, and all sorts of other stuff you don't need! Otherwise, it is a fun time waster!