I saw a few of my friends at the Open Hardware Summit wearing this necklace:
http://blog.makezine.com/archive/2011/09/open-hardware-silver-pendant.html
and wanted to make one for myself. I'm putting it up on my Shapeways shop in sterling silver and hopefully ordering one myself soon!
http://www.shapeways.com/shops/dustynrobots

The open hardware logo is about 2cm across and 1mm thick, so you could 3D print it. I'm going for silver first through Shapeways and will update with pictures when I get it!