Great question! The answer is "pretty much everything."

I tried using a script I found here on Thingiverse, the Shapeways "Imagepopper" app, and then following the tutorial at http://www.tested.com/news/how...

What I learned was this: Take your image you want to extrude, whatever it is, and run it through photoshop to make it completely monochrome.
Mine was this one: http://images.wikia.com/fallou...

Once you have a completely black
&
amp; white image the method you use to extrude it is easier, regardless of the path you take. The scripts choke on any colors, and it's a lot easier to manually follow the monochrome line. I'd expect the scripts would work a lot better with the monochrome image, but once I'd gone that far I just kept going the manual route.

OK, hint taken. I'd like one too, consider it on the queue... I'm not up to it now, so it's backburner but if nobody else does it I'll probably get to one sized for my old iphone eventually.