AT&T has launched AT&T Social Net, a free mobile social networking application that combines access to Facebook, MySpace, Twitter and customizable news feeds within a single application.

Users can view and manage their social communities, communicate and track events in real time, and get live news feeds from over 35 leading news, sports, and entertainment sites. Once a user populates the application with his or her information, users can see and respond to tweets, status updates, wall posts, profile comments, photo activity and friends’ news feeds across their communities. Users can also access new or unread articles from their customized content feeds.

Users can even be notified that they have updates on their social networking accounts when the AT&T Social Net application is closed. When certain actions like comments from a friend, new wall posts or photo updates occur, users will receive a pop-up notification with an option to launch the application and check their updates. Users who wish to disable this notification feature can do so in the application’s settings menu.

Just a word of caution, despite being a free app, standard data and messaging rates apply during use of the application.