I love the idea of Open Source off-site construction. I have just been reminded about it today from seeing various posts about the site http://wikihouse.cc/ . This doesn't seem to contain any real useful information at the moment however... Similar to the way that software developers build their skills in their free time and add projects to their CVs, this seems a great way for various designers, engineers and other construction proffesionals to get experience, help others and develop professionally. Collaborative building development could start off with someone starting a project idea off, even if it's just a cool Garden shed that is energy self sufficient by creating some basic drawings and a project outline. One or two draughtmen could sign on to do the initial drawings, sketchup might suffice but I think something like Inventor or old school AutoCad would be better for this type of drawing. Others could then check these drawings out from the sites source control, make cha