Yesterday's Warlords of Draenor beta build added some neat Hearthstone tributes!

Benjamin Brode, a tribute to Senior Game Designer Ben Brode, is an NPC who wanders around your Garrison selling awesome Hearthstone loot! In the Horde Garrison, he shows up as a human wearing an Orc mask to fit in better.
  •  Golden Hearthstone Card: Lord Jaraxxus. 10. Open up a new pack of Hearthstone cards. In addition to the cloud of dust, you emote the following: "<Name> opens up a new pack of Hearthstone cards. Mmm, love that new card smell.
  •  Winning Hand. 100. Show everyone that you just won a game of Hearthstone. Your character sets off fireworks and dances, and emotes "<Name> just won a game of Hearthstone!"
  •  Hearthstone Board. 1,000. Throw down a Hearthstone board! This also plays the intro Hearthstone music and has the emote "<Name> throws down a Hearthstone board! Who's ready to play?

In a recent build, we also datamined the Hearthstone Tournament Garrison mission. This lighthearted mission sends several of your Garrison followers to a Hearthstone tournament.

They face the following threats: Annoying Zoo Lock, Frustrating Miracle Rogue, and Overpowered Control Warrior. In the data, these link to Gul'dan, Valeera Sanguinar, and Garrosh Hellscream--a nice touch.

The rewards are  Hearthstone Strategy Guide and  Autographed Hearthstone Card, a toy that's "signed by Trump and Reckful."