Or at least "the funnest thing today."

http://css-tricks.com/designing-for-...print-and-web/

If you want to cheat, and see what the article is about, go here: http://www.bluehornet.com/reveal but only if you were one of the kids that peeked at all his/her Christmas presents a week in advance.

Thought about posting this in Web Design, but aside from the neato-keeno design/code behind the effect, for me it's about a spiffy way to present text content.