BioWare Planning Nearly Two Years' Worth of 'Dragon Age: Origins' DLC on MTV Multiplayer highlights comments from BioWare's Dr. Greg Zeschuk suggesting Dragon Age: Origins will have more downloadable content than you can shake a stick at, provided stick-shaking is your idea of a good time:

You have to remember that video game consumers are some of the smartest, most connected people on the planet. You can’t trick them with anything, so don’t even try. I don’t think it’s so much as to trick them, as it is the strategy behind it has to be fully thought out. This is the reason that with “Dragon Age,” our DLC strategy is doing it in maybe a year and-a-half or two years, planning exactly when you’re going to do it and how you’re going to do it. Some of our fans would really like us to extend the world, so it’s going to be something that will make the world even bigger and more interesting. It’s not going to wreck it or break it.