7:48 PM
My favorite April Fools' Day online pranks:

Bungie's product update for Pimps at Sea ("There's no better way to step up your mack attack than with the PimpWheel...").

The new Ollie the Owl constellation on the Astronomy Picture of the Day.

Metafilter getting purchased by Google and the subsequent collapse of the deal.

AICN's bogus 24 spoilers.

The many excellent products advertised today on Think Geek from the Shrinter to the Linux is for Dweebs T-Shirt (see the whole list on their What's New page.)

NPR's "Shellac, the Sound of the Future" on All Things Considered this afternoon.

First Genetics and Marty the Mandrill--one monkey, one keyboard, every possibility of Shakespeare.