I got the idea from this website Woodgears.ca This is my version.
This was added to the Makezine site and I figured I would add it here also and throw in a few renders.

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I would love to see it added to the 3D print group I have just started
http://www.instructables.com/group/3Dprint/
Thanks
Another site worth looking at is <http://www.shapeways.com>. These folks print in plastics but their website includes a users forum, a blog and a community market place where you can offer your "prints" for sale to the community at large. Their printing services are very inexpensive and they provide rapid turnaround. All in all a very innovative company.
If I could... I would love to have one... but the print times can be 8 to 12 hours for a single unit... so I could never figure out how to make it pay for itself.
Here is a video: http://www.youtube.com/watch?v=XHPKrtmBh_I
Jerry