I have just read an interesting blog post over on Dr. Offset's Creature Laboratorium and Taco Stand.
It is his attempt to produce a laser cut corridor system for gaming with, cut into clear acrylic sheet.
He has no plans to sell them as the production cost seems fairly high, but it builds nicely on the experimentation that I have been doing and i thought I should pass the link on...
I will certainly be following the developments of this system closely, as several people have already asked me to try something similar!