After much speculation regarding joint venture Sony Ericsson's "PlayStation Phone", the Xperia Play was officially revealed yesterday through a U.S. Super Bowl ad.The advert ended with a "PlayStation Certified" logo, along with those familiar PlayStation square, circle, triangle and X buttons. There still does not appear to be any PlayStation branding on the device, however.An Xperia Play Facebook page has now surfaced , along with a date for the full announcement. The page states "Tune in on Sunday and witness a new era in the world of smartphones", along with a time and date for each region, including Sunday 13th February 10:00 a.m. PST for the US.A hands-on with the Xperia Play last month revealed that the device will sport a touch-sensitive pad, found between the regular PlayStation style controls.It was originally expected that more information regarding the Xperia Play would arise at the Mobile World Congress in Barcelona on February 14th. Given that the date on the Xperia Play Facebook page is now a day before that, it's anyone's guess as to what will be revealed and where.The Xperia Play is a separate device from Sony's recently unveiled NGP device, the follow-up to the PlayStation Portable.The Xperia Play will likely be the first mobile device that meets Sony's "PlayStation Certified" licensing program, which standardizes Android-based phones for playing older PlayStation games and other titles.