Just spotted this on the Planetbattlefield news page… 

Today at 9am PST FilePlanet will open the Battlefield 2142 beta to the general public. If you do not have a key here is your chance to get one. A new build of the beta is also being released. If you already have the beta, you simply just download the new build from FilePlanet. In order to install the new build you must uninstall the old. More updates will be posted throughout the today and #BF2142 on Gamesurge for the latest info.