Make Pt0104
Wow, Jon-Paul made these amazing Arduino Sketchup models! He writes –

3D/2D models (.3ds, .dwg, .dxf and .skp) of the Arduino Diecimila Board created in sketchup and exported to other 3D formats. This is my site. I am a subscriber to both Make and Craft and hope that I can begin to give back to a community that has renewed my interest in electronics and fab.

Arduino Sketchup model- Link.

Make Pt0105
But wait, there’s more! Here’s a Sketchup Altoids tin model! – Link.