I whipped up a little OpenSCAD script to parametrically generate the new Open Hardware Logo.
Update 2011/04/07 21:38: I tweaked the 3D coin model after doing some test prints and have updated the .scad and .stl files accordingly.
Update 2011/04/09 14:37: I cleaned up the gear_tooth_2d() to be a simple polygon.
Download the DXF variants for use in Inkscape or other 2D vector editors.
Download the STL for a 1 inch diameter "coin".
Download the OpenSCAD code to modify as you see fit.