* UberMedia, maker of of the Twitter app UberSocial, announced Chime.in, a new social platform centered on relevance and monetization for publishers. “Existing systems don’t really have a good way of pulling good content and putting it up top,” CEO Bill Gross told Fortune last week. Users create posts called “Chimes,” which can include images, videos, polls, and links and are shareable on Facebook, Twitter, and Google+. They’re easily sortable and searchable by interests, the people sharing them, popularity, and timeline. You can also choose to follow someone’s Chimes based on topic to winnow out content from the person that’s not of interest to you. Chime.in looks to address monetization by allowing current publishers like Universal Pictures, Bravo TV, and Disney to take 100% of ad revenues from ads they place themselves and 50% from ads that UberMedia places on the publishers’ behalf.

* Twitter CEO Dick Costolo revealed that the information network now serves up a billion tweets every four or five days, a 177% increase from September 2010. Also, over half of its 100 million-strong userbase is active compared with just 30% last January. (TechCrunch)

* GigaOm reports that Skype founders Niklas Zennstrom and Janus Friis are toiling away on a U.K.-focused Netflix-like service called Vdio. Update: According to a source, Zennstrom is actually not involved with the project. (GigaOm)

* Google added more participating merchants to its Google Wallet program, including American Eagle Outfitters, The Container Store, Foot Locker, Jamba Juice, and OfficeMax. The Near Field Communications (NFC) mobile payments app now also enables users to redeem coupons and earn rewards points.  (9 to 5 Google)

* Serial entrepreneur Sean Parker revealed that his latest startup is called Airtime, which some speculate will be a real-time random video chat service a la Chatroulette (sans nudity). (Business Insider)

* Engadget reviews HTC’s Titan with Windows Phone 7, and it may have the largest display on a contemporary smartphone ever. (Engadget)

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