Facebook mobile carrier billing live in select countries – Facebook began accepting mobile payments for its mobile web service via carrier billing in the U.S., UK and Germany this week, according to an announcement from Bango, which is powering the service. Users can buy game credits and virtual goods through their mobile phone operators, eliminating the requirement for credit cards or premium SMS. The Facebook-Bango partnership was first reported in February, but the companies are still rolling out carrier billing to additional countries later this year. Bango provides similar services for BlackBerry’s App World, Opera’s Mobile Store and Google Play.

Offerpop announces new post categories and fan database features – Facebook Preferred Marketing Developer Offerpop this week launched its Integrated Social Marketing Platform in private beta. Offerpop customers will get to use new features like Categories & Posts and Fan Database. With Categories & Posts, marketers can track and categorize their page posts with topic tags to get better insights about what type of content drives results. With Fan Database, Offerpop will automatically create social profiles with Facebook ID & profile data, email addresses and more for every user who lands on a customer’s brand page. Marketers will be able to segment fans based on the categorized posts they Like, comment or share, as well as rank their most engaged, loyal and influential fans.

Ustream adds posting to fans pages and Open Graph to mobile app - Streaming service Ustream this week released an update to its Broadcast For Friends app. The latest update to the application allows page managers to post videos to any of their fan pages. The app also now offers Open Graph integration which helps users share their video activity and history across Facebook.

Facebook now allows ‘Registered to Vote’ story on Timeline – Users can now add that they registered to vote as a life event on their timelines. Users can add details such as where, when and why they decided to vote. If users want more information on how to register, Facebook also provides links to a user’s state election authority. This is similar to Facebook’s recent addition of “Became an Organ Donor” to the life events section of Timeline.