Really enjoying this game. Hopefully there will be an android version at some point as this will be great to play in airports/hotel rooms etc. when travelling with work.
iOS versions are apparently around the corner with Android following after!
also some new content news
Game Content
New premium content will be added to the game which will not effect game balance. This includes:
New Heroes (Varian instead of Garrosh)
New Card Backs (Separate from the ones rewarded for ranked season play)
New Game Boards
Non-Warcraft themed elements will not be added to Hearthstone.
Achievements will eventually be added to the game.
Adventure modes will contain new quests, new game stages, and contain between 10 and 20 new cards.
The first adventure mode will be launched after the game releases on PC And iPad.
More rewards are planned for the ranked ladder.
The first planned expansion back will contain between 100 and 200 new cards.
Death Knights and Monks are not being currently worked on.
Features
The team is currently not working on a 2v2 mode. 1v1 needs to be solid first.
Observer mode is still on the list of things to do, but it is not being actively worked on.
The team is keeping an eye on the length of seasons, but are not considering adjusting the duration of them yet.
taken from http://www.hearthpwn.com/news/275-dev-interview-new-heroes-gameboards-adventure-mode