My friends, we have taken a dangerous journey, the IRC and I. We went straight to Hoid's base, known as the Hoidcave, and recovered a list of what was inside. I hope you enjoy.
Hoid steals things in a Cognitive sense, so both he and others have them. He has the following:
-Dead voidbringers
-Thunderclasts (pets, of course)
-Awakened blankets for when he gets cold
-A bead of Lerasium
-A few beads of Atium
-A dawnshard
-A herald sometimes comes 'round to chat
-A seon
-Tears of Edgli (or y'know, however that's spelled)
-A Rosharian waffle, and some lifeless to guard it
-Cupcakes
-The Twisted bones of a Dakhor monk
-One of the glowing spheres Gavilar gave Szeth
-A mistcloak
-Aluminum guns
-A live mistwraith in a cage
-An aluminum car, that runs on stormlight
-Wayne's lucky hat
-The nightwatcher
-The silvery skin of an Elantrian
-A piece of metal Sazed used as a metalmind at one point
-A bunch of Parshendi carapace
-Kelsier's scars (not the arms, just the scars)
-Shallan's sketchbook
-Two spikes of sodium (for both allomancy and feruchemy)
-A set of occulator's lenses
-Brandon Sanderson (He needs peace to write, you know)
-Strawberry Jam
-The Superkandra
-Nightblood
-The server that hosts the 17th shard
-A dusty old mathematician (trying to keep Hoid from over-fixing our server and crashing it)
-Lightsong's Drunk Monkey
-Barrels of Wine (brought with the monkey, of course.)
Credits to me, CrazyRioter, Emeralis, and Nesh for exploring this wondrous place (that happens to be Shadesmar, just under all the beads).