A few links from recent reading.

ShareThis Study: Facebook Accounts For 38 Percent Of Sharing Traffic On The Web

TECHCRUNCH – Overall, sharing now produces an estimated 10 percent of all Internet traffic and 31 percent of referral traffic to sites from search and social. Search is still about twice as big. When it comes to sharing on the Web, Facebook rules. Facebook accounts for 38 percent of all sharing referral traffic. Email and Twitter tied for second with 17 percent each. (Correction: ShareThis provided a slide with the wrong numbers,now swapped out. Twitter is actually 11 percent, and email is 17 percent). Those are the percentages that actually clicked through. The raw sharing numbers are higher. Facebook makes up 56 percent of all shared content (up from 45 percent in August, 2010), followed by email at 15 percent (down from 34 percent) and Twitter at 8 percent (down from 12 percent).

Mob rule: Iceland crowdsources its next constitution

GUARDIAN -  It is not the way the scribes of yore would have done it but Iceland is tearing up the rulebook by drawing up its new constitution through crowdsourcing. As the country recovers from the financial crisis that saw the collapse of its banks and government, it is using social media to get its citizens to share their ideas as to what the new document should contain. “I believe this is the first time a constitution is being drafted basically on the internet,” said Thorvaldur Gylfason, member of Iceland’s constitutional council.

Authorship markup and web search

GOOGLE – We’re beginning to support authorship markup—a way to connect authors with their content on the web. We’re experimenting with using this data to help people find content from great authors in our search results. We now support markup that enables websites to publicly link within their site from content to author pages. For example, if an author at The New York Times has written dozens of articles, using this markup, the webmaster can connect these articles with a New York Times author page. An author page describes and identifies the author, and can include things like the author’s bio, photo, articles and other links.

Bad news for Nielsen: TV ads to be bought more like online ads

GIGAOM – Two executives from media agency Initiative said TV ads will increasingly become performance-based, moving the industry beyond just trying to amass huge audiences. That could throw a huge monkey wrench into the way brands and agencies think about media buying, and could be disruptive to Nielsen’s ratings system.

Facebook growth slows in US, UK…

The number of people using Facebook during May fell in the US, UK, Canada, Norway and Russia, according to new data. That means the site’s growth has slowed for the second month in a row, even as it approaches 700 million users worldwide. In the US the site lost about 6 million users, from 155.2 million at the start of May to 149.4 million at its end, according to data gathered from Facebook’s advertising tool by the site Inside Facebook. Canada fell by 1.52 million to 16.6 million and the UK, Norway and Russia all saw falls of more than 100,000 users, the site said.

Apple Just Handed Twitter The Keys To The iOS Kingdom — Here’s Twitter’s Take

When we first broke the news that iOS 5 would come with Twitter integration, I wasn’t thinking big enough. Based on the fairly vague (but credible) information I had, I figured it was mainly based around the Twitter Photos product which Twitter was rushing to get out in time. Turns out it goes much, much deeper. Apple has essentially baked a “Twitter Connect” into iOS 5. It’s something that all iOS apps will be able to easily use. And they should. And they likely will.