This is a little bit out of place, because the prints themselves arrived a long time ago; its only now that they're ready to show off, though. I used FUD prints to make rubber molds, and then used those molds to produce wax positives for casting in sterling silver. I'm very happy with the results! I wrote more about the process in a blog post here: http://upnotnorth.net/2012/02/06/question-block_and_crowbar/
Good to see I'm not the only one trying this! Here's a video of the process of making some cufflinks in Pewter using Shapeways to manufacture the master - it's a great route to getting difficult pieces ready to cast, although even the most detailed Shapeways process struggles to reproduce really tight detail. http://www.youtube.com/watch?v=lxuA325fMVg&list=UUBXlOMD a0RgpoWiqXH4NhmA&index=1&feature=plcp