Have you used Wordle yet? Created by Johnathan Feinberg in his spare time while working for IBM Research, Wordle takes words (that you either generate specifically or draw from pages with RSS feeds), and creates these word art images.
You can customize them in all sorts of cool ways - this is my first one, taken from this blog's front page a few weeks ago:
Go on - I know you want to! Make one yourself...
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