Sort of, anyway.  You're in luck if you play on the PC or the Xbox 360, because the first DLC for Dragon Age: Origins since release - "Return to Ostagar" - will be available for download on January 5, 2010.  If you own the game on the PS3, you'll unfortunately have to wait a bit longer, until "late January", if all goes well.

Needless to say, this piece of DLC will allow you to return to the fortified town of Ostagar (or what's left of it) for the first time since that fateful day early in your adventure to save Ferelden from the Darkspawn.  There will be new treasures to find - including armor and weapons of kingly build, as well as new dangers to tackle and, of course, new dialog and story elements that go along with it.

If you've already completed the game, you can load your post-game save and visit Ostagar from there, or, if you're just starting up, you can revisit as soon as the world map opens up to you.  Again, it'll be available for the PC and Xbox 360 on January 5 for 400 Microsoft points or $5.