n a rare moment of disclosure, the normally tight-lipped Twitter announced last week that it now has 100 million active users. Who are all those people, and how often are they tweeting? Here, a brief guide, by the numbers, to the micro-blogging site's big milestone:
Number of active users Twitter had at the end of 2009
Number of users who have logged in and tweeted in the past month
Number of users who have logged in but not tweeted anything themselves in the past month
Number of people who have visited Twitter.com in the past month, according to Google Analytics. Users don't have to log in to read most Twitter content.
Percentage of NBA players who are on Twitter
Percentage of congressional members in the U.S. House who are on Twitter
Approximate number of Twitter followers to whom former Rep. Anthony Weiner (D-N.Y.) sent a lewd photo of himself in May
Number of Twitter followers the lewd tweet was meant for
Percentage of senators who are on Twitter
Number of followers Sen. John McCain (R-Ariz.) has. That makes @SenJohnMcCain the most popular tweeter in Congress, according to the website Tweet Congress.
Percentage of the Billboard Top 100 musicians who are on Twitter
Number of followers Lady Gaga has
Percentage of the top Food Network personalities who are on Twitter
Number of followers Paula Deen has
Average number of tweets sent each day, adding up to more than 5 billion tweets per month
Record number of tweets per second — a mark Twitter hit two weeks ago
Amount of venture capital Twitter raised in its latest round of funding, which it wrapped up last week, on top of another recent round of fund-raising that brought in another $400 million. "Now we have what can only be referred to as a truckload of money in the bank," says CEO Dick Costolo.
Recent valuation of Twitter in light of the latest rounds of funding
What the company was valued at last December
Twitter's projected revenue for 2011. "Unlike Zynga and Facebook, Twitter is still experimenting with business models and isn't cash flow positive," says Mashable's Ben Parr.
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