DICE has opened up the Caspian Border map on Battlefield 3 for the PC. You can access the new content simply by entering Battlelog and running a search for a Caspian Border server. From there, look for an open slot, and dive in. Ok maybe that came out wrong, but you get the picture.
The beta is set to wrap things up this weekend, so its quite possibly your last chance to play some Battlefield 3 before it’s October 25th launch.
No word on if Caspian Border would be opened on consoles as well, I suppose anything’s possible.