Wordle is a toy (nifty tool) for generating “word clouds” from text that you provide. The clouds give greater prominence to words that appear more frequently in the source text. You can tweak your clouds with different fonts, layouts, and color schemes.
Wordle also lets you create these "word clouds" using a RSS feed. Sumit Kataria has written a PHP script to generate RSS feeds from DayPIs for any search term you have. Just a perfect fit to use with Wordle!
Here is a RSS feed for Barack Obama - http://develop.daylife.com/demos/feed.php?query=%22Barack%20Obama%22
Feed it to Wordle on http://wordle.net/create and here is what you get
Another RSS feed for "Global Warming" OR "Climate Change" - http://develop.daylife.com/demos/feed.php?query=%22Global%20Warming%22%2...
And here is its Wordle! -