Six things Twitter doesn't want you to know

2) The microblogging site is expecting to generate $46 million of operating profit on $140 million of revenue by the end of 2010 (Click here to see how Twitter plans to do this). By 2013 it expects to be making $1.54 billion in revenue and $111 million in net earnings. By this time is reckons it will have one billion users and 5,200 employees.

3) Twitter apparently plans to offer a range of 'official' branded merchandise, including baseball caps and t-shirts emblazoned with the company’s logo.

4) As of February, Twitter had $45 million in the bank. No wonder co-founder Biz Stone isn’t in a rush to roll out a commercial offering. "We’re not under any pressure to hit a home run," he told Revolution recently. "We want to take our time and get this right".

5) Twitter expects the cost of each user to the company to be just over $1 a year, not bad considering some microbloggers post hundreds of tweets a day.

6) Twitter bosses Biz Stone, Jack Dorsey and Evan Williams received an email from production studio Through The Eyes Production pitching the idea of a themed reality-TV show called 'Final Tweet'. According to the email, ‘Final Tweet' pits four teams of entrepreneurs against some non-profit organisations for a cash pot of $100,000.

Biz Stone has confirmed the documents, first published by TechCrunch, are legitimate, but says they are out-of-date and were never considered official. "Obviously, these docs are not polished or ready for prime time and they're certainly not revealing some big, secret plan for taking over the world, he wrote on his blog.