It appears that various media like: Engadget, Ars Technica, FoxNews, have now received the official invitation from Apple for the event on January 27, 2010 at 10:00 (US PST) held at Yerba Buena Center for the Arts in San Francisco.
Fox News even went as far as reporting that they have confirmation of the topics that will be presented by Apple. These being the new tablet, iPhone OS 4.0 and a new version of iLife.
