There's a bunch of web thingies around that let you compose a text into a ransom note style collection of images based on a set of twitter images that represent letters. These twitter letters are hand picked of course and you'd think in these automated times we wouldn't need hands to do the picking when we have Google sorting our images.
And indeed, if you search for [letter x] on image search, Google will quite consistently return a set of images that look like letters X. Add the Ajax Search API and css rotation for extra ransom-note-ness and you have a party.
Google Ransom note is exactly this. Enter a note and each letter will be searched for using image search and a random result from the top-4 will be returned and displayed with a rotation ranging from -10 to 10 degrees. Simple but it works out quite nicely.
Give it a try