Set with the Akzidenz Grotesk font, which Adobe claims a copyright upon - and probably some design patents - so I'll likely make another version with a free font later. I just picked something that looks nice for now.

If you're interested as to how I made it, I pretty much used some basic shapes and Blender's boolean modifier:wiki.blender.org/index.php/Doc:2.5/Manual/Modifiers/Mesh/Booleans

11/28/11
Updated the source files so that the six isn't backwards.