After the fan petition that made Blizzard put it into the game and the data gained from the datamine of the beta a week or more back, some gamers in the Warlords of Draenor beta have located where the tribute to late comedian and actor Robin Williams looks to be placed.
On a small island located off the coast of Talador, a user by the name of Haldhur found a genie NPC that is named 'Robin'. The NPC is summoned by rubbing on a placed item called the Ever-Burning Lamp to which he will emerge and quote "INFINITE COSMIC POWER!" before shrinking down and quoting "Itty bitty living space." before waving goodbye.
The island also contains a large split egg that could be the possible future location of the Mork-like human male character discovered in the datamine as well as some stuffed toys that could be a reference to Toys.