Just a day after Google's announcement that it was planning a free Internet email system caused many Internet users to wonder if it was part of an April Fool's Day joke, Bill Gates revealed that Microsoft had also played a joke on Internet users. The frustrated Gates said in a press conference today that he was disappointed that no one, including Microsoft users, seems to have gotten the joke. "Years ago," confessed the 48 year-old trickster, "I began what I considered to be the greatest practical joke of my life, and no one got it." "First I purchased a...