I'm blown away by Gapminder, an amazing presentation of various world stats from the folks at Google.
I don't know about the stats themselves (I assume they're OK), but the presentation is mind-blowing. SciAm said
Finally, and Not To Be Missed Under Any Circumstances: The Gapminder World, which is only the world's most fantastic and amazing piece of interactive infoporn you have ever laid eyes on. Really.Well, that's certainly true for me.