“Light painting Wifi,” the Better Life Index, and a visualization of how people share New York Times stories are among the year’s best data graphics.

This week’s edition goes out to the Walker New Media department, who built this site: Classic HTTP server error messages… in cats.

Which museum has the most Twitter followers? The most engaging Facebook posts? This site aims to track it all, by watching the online life of some 3,000 museums.

Having driven well over 25,000 miles with its 360-degree Street View cameras, Google announces that it has completed documentation of the destruction from last March’s earthquake and tsunami in northern Japan.

For Music Hack Day 2011 last week, Berlin-based web developer Robert Böhnke created a hack that has the iPhone’s voice-activation interface Siri laying down lines from Notorious B.I.G.’s “Hypnotize.”