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Twitter has started gradually rolling out a new, HTML5-based version of Twitter.com for the iPad.

Facebook announced Tuesday that it was acquiring Push Pop Press, an interactive digital e-book publisher, although Facebook said it did not plan to enter the book industry.

ComScore and Nielsen are introducing rating systems for Facebook, to help advertisers better compare the social-networking site to traditional advertising outlets such as TV and print.

Twitter said it received a "significant" round of funding led by Russian venture firm Digital Sky Technologies.

Are those who post unverified reports on Twitter playing an important role in the new ecosystem of news, or being irresponsible and indulging in gossip? That question goes to the heart of the idea of news as a process rather than a finished product.

After a running start, Google+'s growth may be slowing down a bit. A report from Experian Hitwise found both traffic and users' average time on the social network fell last week in the U.S.

Several Google+ users have had their Google accounts — including Gmail, Docs and other services — frozen or purged, with a message telling them that they have violated the company’s Terms of Service. What do these users have in common? Many of them are not using their real, legal names on their profiles, ZDNet reported.

Gizmodo reader Tal Ater agreed that Facebook's new chat system is a clusterzuck of confusion, so he created a little program to fix it! It will take off the list anyone who's offline.

The Women's World Cup final between Japan and the United States set the record for tweets per second, eclipsing the wedding of Prince William and Kate and the death of Osama bin Laden.

A boom in apps has fed longstanding tensions between Twitter and the developers over whether they are partners or competitors.