The DIY 3D scanner setups I've seen:

http://www.makerbot.com/blog/2010/09/14/new-makerbot-3d-scanner-kit/

http://www.makerbot.com/blog/2011/05/26/3d-printing-with-kinect/

I've been lusting after some of the low end 3D printers, now that they're in the sub-macbookpro price range, and looking to justify the desire with additional uses, such as replacement plastic parts.

http://botmill.com/index.php/3d-printers/glider-105.html

or milling & scanner in one!:

http://www.rolanddga.com/products/scanners/mdx15/

But it always comes back to the 3D scanning portion.