A Boojum Snark's gametype and prop library found here :

http://forums.tf2maps.net/showthread.php?t=4674

Ravidge's Lighting library found here :

http://forums.tf2maps.net/downloads.php?do=file&id=1518

Expert mapper livestream, containing recordings of extreme mapping action.

http://livestream.com/acegikmo
http://livestream.com/mangy

Definitely check out the Iron Mapper videos contained in those livestreams, great material there.

Here is the 10 minute competition recap

NEED A DISPENSER HERE

I will add more as I go.