Since I can’t come up with a remarkable April Fools joke, I’ll just point you towards this post from 2006 by Anil Dash.
Your April Fools Day Joke Sucks.
Hmm. So this is what it’s like being a critic. Much easier than trying to create or do something new and interesting. I could get used to this! 
Just a observation on the 2006 post and the comment about how announcing a company buy out or take over…..
“Our tiny company bought/got bought by a giant company. Like Microsoft!” Wow, that’s lame. Neither believable nor surprising enough to be amusing. “…
…and today’s announcement that google has taken over facebook : ) now to be known as googleface…..
A little bit of irony but I don’t think the announcement was a joke!
cheers
Shaye Richardson
Hmmm … Josh, I think I resemble that remark — item #2 about the company takeover. Seriously, though, I’m funny. If you don’t believe me, just ask my wife, she hasn’t laughed at a single joke since, like, after our first three months of dating.
Cricket, cricket, cricket.
Jeff
Shaye,
Thanks for the comment! But I think the Google announcement was indeed an April Fools. Or am I reading you wrong?
Jeff,
Ha! I promise this wasn’t directed at you. I was just feeling like being a spoil sport cause I couldn’t come up with a worthy prank.
Glad your wife thinks you’re funny tho. :p