The medieval buildings you'll see below have seen a lot of use in my rpg's. I love running games in cities, so it's no wonder - and the campaign I'm just about to finish is Ptolus, a huge book having a complete urban setting for D&D 3E.
The buildings are built almost completely from cardboard + surface materials - that's same old filler powder/PVA glue mixture I've used in so many of my models.
Most frequent question I get asked on gaming sites is about how I have created fire and smoke. Now I'm releasing a tutoral about this topic - while it's actually about creating starship wrecks, it will teach you how to model fire. Another page (coming soon) will show you applications of this technique.
Professors Keane and Scanlan from Southampton University have printed out an airplane that flies; This is far more advanced than printing out miniatures. So, when shall we have 3D-files having miniatures we can print out? That requires affordable 3d printers.