Facebook round-up: carrier billing, Offerpop, Ustream, voter registration

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.