Groupon

Zynga files for IPO, says its future is mobile

Social gaming giant Zynga has filed for its much-anticipated initial public offering in the US. While the company has yet to put a price tag on the shares, as part of the process of calculating its registration fees with the Securities and Exchange Commission (SEC), Zynga has estimated it will raise $1bn from the sale.

AT&T launches online deals service

US carrier AT&T is to launch an online coupon service to rival Groupon and Facebook’s offerings. The discount site, which will run on the telco’s yellowpages.com subsidiary, launches in June with initial services in Los Angeles, Atlanta and Dallas-Fort Worth. To entice users to sign up, AT&T is offering a $10 credit. More cities are expected to follow after the initial launch, as well as national deals, all of which will be available to mobile device users, according to AT&T.