Here's a prototype 3D dungeon mat, some MageKnight dragons and some dollar store gargoyles that I plan to use as giant statues someday...
A bunch of old AD&D modules, Judges Guild stuff, and some other odds and ends.
AD&D 1st and 2nd edition hardbacks, OSRIC, ACKS, Dungeon Tiles, etc.
Hero System stuff, Arduin, Secret Fire, My set of Citybooks, FUDGE stuff and Tunnels and Trolls
Misc stuff -- there are Dragon Magazines, White Dwarfs and Dungeoneers in those white boxes
More Dragons and some odds and ends --
Binders of printouts, misc. projects (poorly labeled), the new Rappan Athuk, Matt Finch's Tome of Adventure Design, Paizo cards
Printer drawers with painted and unpainted minis in them. I have tons more boxes yet to paint and I have the Reaper Bones Kickstarter coming. I believe if I never buy another mini, I will die with unpainted minis in my collection. :)