FatSean's Journal: Reccomend a Free/Cheap CAD program for home design

I recently purchased a home, and have no blueprints for it. I would like to be able to create a model of the house and systems on my computer so that I can easily reference it. I'd like to map out electrical circuits and fixtures, plumbing, doors, walls, etc. Being able to associate appropriate specs to a fixture (e.g. watts consumed, flow rate, etc) would be great.

Is there a cheap/free solution for me? I don't really care about 3D rendering but layers would be nice, and I'm willing to install Linux on a partition if that is what it takes :)