Google has a long tradition of perpetrating April Fools' Day hoaxes. According to my sources, who are located in India where it is already April 1, 2010, one of the April Fools Day pranks to watch out for this year is the announcement that Google real-time search results are powered by Pigeons who've been given Red Bull, whose slogan is "it gives you wings."
Then in 2002, Google revealed that the technology behind PageRank was PigeonRank, a cost-effective and efficient means of ranking pages that didn't involve animal cruelty.
In 2004, the company announced there were job opportunities for the Google Copernicus Center, its research center on the moon.
On April Fool's Day 2006, the company introduced Google Romance on its main search page with the observation, "Dating is a search problem. Solve it with Google Romance."
On April 1, 2008, Google released Adsense for conversations. Meanwhile, YouTube Rickrolled all of its users that day by linking all its featured videos to Rick Astley's song "Never Gonna Give You Up."
So, what will we see this year? I think my sources in India are pulling my leg. The email tipping me off was signed, "Sloof Lirpa," which as we all know is April Fools spelled backwards.