CloudFab makes it easy for companies to source custom and short-run manufacturing automatically through a network of vetted suppliers. Users upload design (CAD) files, and we instantly price them and analyze them for manufacturability. When an order is placed, the design goes directly to the manufacturer for production.
Check it out here:
http://dl.dropbox.com/u/6721316/CloudFab/LensCap.stl (sample design file)