Twitter valued at $3.7 billion

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With more than 175 million registered users, Twitter is now estimated to be worth $3.7 billion, if the value of a new investment made in the company is worth the paper it's written on.

The micro-blogging company said yesterday that it had rustled up a $200 million investment from Californian venture capitalists Kleiner Perkins Caufield & Byers.

Twitter claims that an assessment of how much of the company it had to hive off to secure the investment, reveals a total worth of $3.7 billion (£2.312 billion).

Valued in traditional terms, that is: money in versus money out, the operation would be worth far less than that, as the outfit is still scratching its collective head, trying to work out how to make money out of its massive audience.

It had begun running advertising in the form of paid-for Tweets which, according to one estimate from research firm eMarketer will bring in around $50 million this year.Other revenue comes from search engine sites like Google and Microsoft but that is hardly likely to amount to a fortune.

The platfrom scored a signifiacnt coup this week when the judge at Julian Assange's bail trial in London allowed twittering from the courtroom.

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