Summary
Have you ever wanted a Gothic Cathedral of your very own?
Are you intimidated by the centuries long construction schedule, and the punishing job requirements of being a European Bishop during the Dark Ages?
Then We Have a Thing For YOU!
The Gothic Cathedral Play Set!
Update November 2013:
A repaired version of these files for use with Makerware and Sli3r are available here:
http://www.thingiverse.com/thing:184345

Instructions
The Gothic Cathedral Play Set is designed to be modular. Print as few or as many parts as you want. Then assemble them into a configuration of your choosing. The full model pictured here is made up of 20 parts.
It is not an exaggeration to call this the Mount Everest of MakerBot prints. The overhangs and arches are designed to be right at the limit of the machine's unsupported capability. I have a similarly sized 'cathedral of failure' from all the times the extruder knocked the build platform off. But, if you can make it to the end, boy what a story you will have to tell.
(Update) I am happy to see people like the Gothic Cathedral Play Set and am looking forward to seeing pictures of other peoples copies. I have posted more details and configurations on the CCCKC Blog, the Kansas City hackerspace I belong to.http://blog.cowtowncomputercongress.org/