Examiner.com has a pair of preview pages from the upcoming Dungeon Master's Guide (Nov 28th in preferred stores, Dec 9th everywhere else).
These two preview pages are from the section on traps. The second is very small and low-res, and hard to read, though I've enlarged it.
Previous DMG previews: The Multiverse,Appendix A: Random Dungeons,Wondrous Items, Creating a New Race, Building NPCs, Magic Items Table, Villainous Classes, Table of Contents, Firearms, Explosives & Alien Tech, Eye/Hand of Vecna & Orbs of Dragonkind, Magic Rings, Figurines of Wondrous Power, Deck of Many Things
These two preview pages are from the section on traps. The second is very small and low-res, and hard to read, though I've enlarged it.
Previous DMG previews: The Multiverse,Appendix A: Random Dungeons,Wondrous Items, Creating a New Race, Building NPCs, Magic Items Table, Villainous Classes, Table of Contents, Firearms, Explosives & Alien Tech, Eye/Hand of Vecna & Orbs of Dragonkind, Magic Rings, Figurines of Wondrous Power, Deck of Many Things