Since everyone else seems to be using this section to show off their maps, I'll do it too.
Some of you may recall me having worked on a small partially finished house before. I decided to start over. This time I'm working in google sketchup so it will be much more precise.
The goal of this project is to create a small and properly scaled house. Not a finished house though, just the frame of one. You'll be able to explore the framing of the house and take a look at how exactly we build homes in America. It won't be entirely accurate, I'll probably cheat a bit in places and I'm not going put in finishing materials (sheetrock, siding, carpet, etc), but it will be fairly close. I'll throw in sloppy blueprints that have that information on them if you're really interested.
You can race a jeep across the floors, fly under the floor, build between the rafters. It's all open, and in my opinion, a much more interesting environment then a complete building.
9/26/09 Update 1

The foundation has been poured and ready for the first floor to be framed.
Current dimensions:
32x32 foundation wall with a 16x16 L shaped cut out. The foundation wall is 12" thick and 4' tall (so the footer is just below the frost line). The foundation footer (the wide bit around the bottom of the wall) is 24 inches wide and 12 inches tall, with 6 inches projecting on each side of the foundation. A very typical foundation wall. Just pretend there's some rebar and wire mesh in there too. I'm not going to cut out a section of the wall and show the rebar, that's too much work and I don't think it would look very good. I may model some in blender after I finish the building and place a bundle of it somewhere for scale and decoration.