SAN FRANCISCO – The popular “microblogging” site Twitter has announced that they have achieved positive revenue in the fourth quarter of their fiscal year by installing a snack food vending machine for their employees in the breakroom at their headquarters.

The company, which was founded in 2006, has heretofore struggled to formulate a viable business plan. Attempts to monetize the tremendous volume of “Tweeting” have failed.

It has been reported that Twitter’s venture capital investors (from whom the company has raised over $57 million) had placed pressure on the business to record revenue by the end of the 2009 fiscal year.

In a press conference Wednesday, co-founder Biz Stone first apologized for his name then remarked,

I cannot tell you how excited I am to stop using air quotes every time I talk about our “business”– today I can announce that Twitter has achieved positive revenue.

While we remain privately owned and financed, with a view to an eventual initial public offering, we are releasing a limited amount of information on our revenue results.

As you will see, the product mix is reasonably well-balanced, but we do have concerns about customer concentration. Fully 90% of Twitter’s fourth quarter revenue is derived from employee purchases and 30% can be ascribed to one individual, a software engineer who works on the second floor– we are therefore working on a strategy to broaden our customer base.

President Barack Obama has reportedly asked Stone to fly immediately to Washington D.C. to brief him on job creation and industrial policy.