So, we decided to take matters into our own hands, and invest a little time to get a better map of our soon-to-be house. Using Inkscape (a free open-source alternative to Freehand & other similar vector graphics programs), I traced over a scan of the floor plan to come up with an editable, scalable, zoom-able floor plan of our new house. It's not exact down to the inch, but it's pretty darn close. Here's the bedroom:

The cool thing is, since Inkscape supports layers, now I can also add layers for other things, like furniture, rugs, etc. Using a tape measure and a conversion between inches and pixels, I added a few of the larger items in our house to the rooms, so we can really get a sense for how big these rooms are compared to our current place. Here's the bedroom again:

That makes it so much easier to visualize how this house is really going to turn out.
My next step: trying to do a 3D model of the house with Blender, so we can make decisions about decorating. Wish me luck - I've never done any 3D modeling before. :)