It's nice that you are offering the key. I also have some dota 2 keys to giveaway but no hots. I'm really excited for hots but i dont want to join the beta since i dont have much time at my hands and i would like to keep it all as a nice big surprise when i actually buy the game.
If you havent given the key to Zero(ps) already, then maybe i can help out. I can give you some items on D3 or maybe some gold.