Hey! Did you make the puzzle terrain yourself? That's pretty cool looking.
The mat is mine, 1/4 of full gym/exercise mat. Each square is roughly 2'x2', including the edges. I was lazy so I didn't put the puzzle edges on the other two sides.
The mat is covered in brown caulking and then has had coffee grounds, flocking, and a few other things applied while the caulking was wet with a coat of white glue on that afterwards. If I were to do it again, I would have painted the mat before I caulked it, because it peels off. Also be aware that you end up with water rings from your white glue if you aren't lucky. But I now have 4'x4' of fully flocked terrain, which looks great on the table.
As for the other scenery, all buildings are Wirelizard's save the square one with the Aviators Tobacco advertising (anybody who has seen his pulp graphics should recognize it), that building was my birthday gift to him last month. The trees are his and are Pegasus' banana trees (sans actual bananas). We lacked a lot of other details, like crates, trucks, etc., so the board looks a little bare.
I still have those notes from the 2nd ed stuff, but I am currently at a conference and don't have them in front of me right now. I may post them tomorrow if I find the time.