http://www.readwriteweb.com/archives/twitter_could_go_public_in_2013_but_why_bother.php

Feb 5, 2012:
If last week's highly-anticipated Facebook IPO was too much excitement, not to mention too many numbers packed into a dense, 197-page S-1 filing with the Securities and Exchange Commission, breathe easy: it does not appear as if Twitter has any short-term plans to follow suit and become the last of the big three social networks to trade as a public company.

"Over time, I think that all the same factors that led to Google and Facebook going public will eventually lead [Twitter] to do the same," Bill Gurley, a partner with Twitter investor Benchmark Capital told CNBC on Friday. For now, however, Twitter has no plans for an IPO and is focused on building out its advertising platform, he said.

That of course hasn't stopped widespread speculation about a public offering by the microblogging service. The Web site www.twitteripo.com curates news articles related Twitter, giving top billing to any that mention of IPO rumors. And a surefire way to generate traffic for your story about a Twitter IPO is to guesstimate the date of such a filing in your headline (current consensus: Twitter will be the biggest IPO of 2013).