On April 1st, no RSS feed is safe. Reddit looks like Digg threw up on it. Drew Curtis pulls a Zuckerberg with "The New Fark Experience" (to be rolled out April 2nd, naturally). Think Geek is selling unicorn chasers, USB pet rocks, and interactive Portal shirts (although now I really want a Tauntaun sleeping bag). Google's AI CADIE has become self-aware, discovered pandas, and now wants to answer your Gmail for you. Expedia's offering deals on flights to Mars. Today's Zero Punctuation was sponsored by Pony Jam. And there will be no shortage of fake articles, upside down logos, and Rickrolls.

Strangely, after last year's grand xkcd-Questionable Content-Dinosaur Comics URL switcheroo, very few webcomickers have taken part in today's slightly annoying festivities:

• Amazing Superpowers goes Web 1.0 for the day, taking us back to 1996 with a space-themed background, animated GIFs, a MIDI (thankfully not on autoplay), and a series of game sprite comics.
• At Overcompensating, Jeffrey Rowland announces that he's sold his webcomic merch company TopatoCo to Snorg Tees, and gives us a taste of the fruit the unholy union will bear.
• HijiNKS Ensue replays Ctrl+Alt+Del's infamous miscarriage scene with Joel and Josh in the starring roles.
• Wondermark gets a new a style that looks suspiciously like Tony Millionaire's Maakies.
• David Willis announces that he's ending Shortpacked! in favor of a Roomies! reboot.
  
• Today's Dinosaur Comics isn't an April Fool's joke, because T-Rex has had it up to here with April Fool's jokes.

I'll update as any others come in. But it seems that the biggest joke this April Fool's Day was that there were hardly any pranks at all.