Some cool stuff I've messed around with. Spoilers for those who want to discover on their own.
Teleporter - Teleports you to one of three random places. One is a space stage, with Martians and Greys, the Greys frustrated over a broken spaceship. Another is a cave with Mummys and a Behemoth, being explored by an archeoligist and Vampire Hunter. The last is 5th Cell's office, showing various developers (one girl is a zombie), their logo, and a rallycar with their logo.
Genie Lamp - Summons the obvious. 'Empty' the lamp and out pops a Genie. 'Use' the Genie and she gives you treasure.
Mirror - Vampires are afraid of them.
Virgin - A gamer pops out.
Shark Repellent - Summons exactly that, and it works.
Night/Thermal Vision - Both are in the game and both 'work'.
Love - Summons a heart.
Alien + Cow/Farmer - Alien will often ignore most creatures, unless they're hostile, but will specifically go after farmers and cows.
<Brumisator> dr matta is starting to act more and mor like the retarded part of gui's brain when he posts [HLF]GUI: Seeing your name in red brings nothing but shadows to my dark soul. you will ruin this site. humanity. will burn. EatChildren: oh god not dr matta what have we done