In more official news, Bethesda put out a series of new screenshots today giving you a better look at what this add-on's going to be about.
Lastly, the team has put up a surprisingly in-depth development diary describing the creation process for Point Lookout, which is apparently going to add a large amount of new real estate to the world of Fallout 3. It goes into all kinds of detail about how they arrived at the ideas in the add-on and then turned them into a new playable area.
Building a whole new region is a lot of work, but the team knew what it needed to look like and where everything needed to go. Every tree and rock in Point Lookout is placed by hand, so simply filling out the world was a significant effort. As the world-building team completed initial passes of the world, we held “World Walk” meetings that involved just running around the world and exploring it. We constantly gauged the feel of the world, the density of gameplay encounters, exploration rewards, and general points of interest. Thanks to these meetings, we knew when and where to add additional points of interest or tweak the ones what the team already had created. Many of the guidelines that we used in Fallout 3 for density simply didn’t apply to creating a swamp. While the Capital Wasteland is spread out and desolate, Point Lookout is much denser. The new region is more populated, there is a much heavier fog, and points of interest and encounters are much closer together. This density in Point Lookout created new gameplay problems for us to solve.