BlizzConline Q&A - First Question Submit
Blizzard has opened a special place to submit questions you have about Hearthstone, so they can perhaps answer them at the Q&A at Blizzcon later this week.
If you have a question, use this link: LINK!
This way to ask questions will stay open until Feb 18th. This is not the only time to hand in questions however! After the Opening Ceremony this Friday Blizzard will open up the inbox again, for questions that may have arisen from the things revealed during the Opening!