C'mon! I want to see everyone's lair plans! :D SHOW THEM!
Mine are at: http://www.furnation.com/mirsathia/hzlair
I destroyed my original plan, and redid it yesterday. I'm quite pleased with it - all of the major shops are in, and I still managed to keep level 5 and 6 free for any additional structures I might want at a later date. :)
~Mirsathia