Here's an entry for a Conceptart.org industrial design of the week. It asks that WIPs (works in progress) are posted too. It's great to see and learn from other peoples work flows, and to look at your own. It can cut out unnecessary stages, and reduce design work to a fast bare minimum.
The design was mean to be for a super fast grave digger considering a massive popluation crisis. This machine basically pile drives people into the earth... Nifty eh?