Previously StumbleUpon had about 500 major categories for people to choose from and flip through.
And what about the communities at digg, reddit, StumbleUpon and other social media sites?
Sites like StumbleUpon, Reddit, Newsvine and Propeller can each add between 5, 000 and 10, 000 more.
StumbleUpon founder and chief Garrett Camp wrote about the news on his Twitter account earlier.
But StumbleUpon has redesigned its index in recent months and changed the way its ranking algorithm works.
Among social media sites, it tracks the top seven: StumbleUpon, Facebook, Twitter, Reddit, YouTube, Myspace and Digg.
People still use StumbleUpon to discover new websites, not search for a specific thing like a restaurant address.
StumbleUpon was acquired by eBay in 2007 and bought back two years later by founders and venture investors.
Brands are not paying for this service now, but StumbleUpon could add related paid features in the future.
Digg, Reddit, and StumbleUpon showed how users could generate content themselves and make the overall community more valuable.
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Just last year during the same period, StumbleUpon made up 30% of the traffic, while Facebook had 48%.
The article was shared nearly 25, 000 times in social media through Facebook, Twitter, Redditt, Stumbleupon and Linkedin.
StumbleUpon has made a big push on its mobile and iPad apps recently.
But, as a recent Atlantic article reported, the growth in online sharing with StumbleUpon outpaced Facebook in 2010.
StumbleUpon accounted for about 43% of the U.S. social media traffic on January 1st, while Facebook accounted for about 38%.
And I can assure you I will be posting this to both my personal and professional Twitter, Facebook and StumbleUpon accounts.
StumbleUpon has also added the ability for brands and celebrities to create their own channels and has 250 partners at launch.
Reddit also ranked as a top source of referral traffic, with both Stumbleupon and Reddit significantly beating out Delicious and Digg.
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So far, there's a comforting group of heavy hitters, including Skitch, Box.net, Associated Press, Evernote, eBay, StumbleUpon, Pandora and Slacker Radio.
StumbleUpon, the website recommendation service where he works, picked up the tab.
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The new offering is a response to companies like StumbleUpon and others that are already reimbursing employees for their use of the service.
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However, this new feature is more directed and specific and makes it halfway in between a search engine and what StumbleUpon used to be.
StumbleUpon, the site for finding new websites and online content, has redesigned its website and rebranded as it preps to go after international markets.
Stumbleupon was originally written as a Firefox extension, a toolbar you could put in your browser to help you find and share Web sites.
Essentially, they argue, because StumbleUpon users are so disproportionately active, any sample that misses some of them will vastly underrepresent their impact in driving traffic.
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StumbleUpon does on the order of 1 billion referrals a month.
StumbleUpon spun out in 2009 from eBay, which previously acquired it.
Web discovery service StumbleUpon has just overtaken Facebook as the No. 1 source for social media traffic in the U.S., according to analytics site Statcounter.
Services from Pandora to Stumbleupon to Birchbox have proven that people often consume more when relieved of the burdens of too much information and too many options.
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StumbleUpon, the social discovery service, has about 15 million users.
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