The Twitter API, beyond its great utility for corpus linguistics (see "On the front lines of Twitter linguistics," "The he's and she's of Twitter"), has made possible a lot of fun automated text-mining projects. One fertile area is algorithmic found poetry: there have been Twitter bots designed to find accidental haikus, and even more impressively, a bot named @Pentametron that finds rhyming tweets in iambic pentameter and fashions sonnets out of them.
And then there is found wordplay, which is its own kind of found poetry. I'm a big fan of @Anagramatron, which discovers paired tweets that form serendipitous anagrams of each other. (Example: "Last time I do anything" ⇔ "That's it. I'm dying alone.") Now, courtesy of Jesse Sheidlower, comes @PangramTweets, in which each tweet contains every letter of the alphabet at least once.