Twitter

April Fools Day is the perfect time for people to play practical jokes and pranks on each other. But the holiday isn't just for individuals: Large companies have long had a tradition of using April 1 to pull humorous hoaxes on the public too. Here are a few favorites.

Twitter co-founder Biz Stone has rejected the IPO rumors and widely reported notion that the popular microblogging site is in talks to sell a 10% stake to JPMorgan Chase for $450 million -- which would have jacked up the site's valuation to $4.5 billion.

A little late to the social media party, JPMorgan plans to invest $450 million in Twitter to buy a 10% stake of the social media company.

Among the top online stories for investors: See a young Steve Jobs prepare for his first television appearance, a look at Google now and Google more than a decade ago, the smartest machine on Earth.

Some of the day's top online stories for investors, including the AOL-Huffington Post deal, the four keys to Apple's success, and Google's Eric Schmidt on the future of computing.

Google has teamed up with its newly acquired social-media-voice company, SayNow, and social network Twitter to set up a new service this weekend that enables Egyptians to tweet via voicemail, bypassing the country's Internet shutdown.

Google (GOOG) and Twitter have launched a phone service that will let people in Egypt send out tweets, even though the country's Internet service has been effectively shut down. Users will be able to call a phone number and leave a voice message, which will then be translated and tweeted with the...