Ah, April Fool's Day, the bastion of prankery, and in some places an excuse to stick fish to people.
Here are some of the pranks I've come across today:

• How Stuff Works explains the new green The Air Force One Hybrid.
• ThinkGeek is offering some interesting items. I'm definitely picking up Super Pii Pii brothers for the Wii.
• CNET News.com is reporting Facebook Founder Mark Zuckerberg to Host SNL.
• World of Warcraft announced a new Bard class that can vanquish its enemies with the "power of rock".
• Xbox.com is advertising some new Spring items. Honestly, I've been waiting for Xbox Live the Boardgame for some time now.
• Bungie.net's player map seems to have found Mister Chief.
• Wizards of the Coast has updated their site to advertise D&D 4. The site now features 100% less art!
• WotC has also updated the D&D 4 errata. Who knew that D&D doesn't use dice anymore, but rather a core mechanic of rock-paper-scissors?
• Engadget Mobile has tweaked their logo a little in response to a cease and desist sent from T-Mobile concerning their use of the color magenta.
• Gizmodo appears to have been taken over by Mr. T.
• Google introduces Gmail Custom Time to ensure all of your e-mails are on time, even if you send them late, and is teaming up with Virgin to send you to Mars.
• The Wookiepedia has been translated to Aurebesh.
• Astronomy Picture of the Day is reporting that new International Space Station robot, Dextre, is demanding to be called "Dextre the Magnificent".
• IGN has the exclusive Legend of Zelda movie trailer.
• Kotaku is now exclusively covering cakes.
• Veronica Belmont of Mahalo Daily interviews Steve Jobs.
• Last but not least, check out some of the great Featured Videos on YouTube.