have the activation keys been sent out yet for those that bought the game already?

email from Greenman Gaming:

The game launches on 27th August 2013. Shortly before then you will receive your game activation key and instructions. You will need to register to continue playing after the Early Access period closes.

i have already registered pre-order... just making sure i havent missed anything

I doubt the keys have been sent. More then likly they will be sent on the 26 or 27th.

I think they definitely went out by now.