As of the time of this posting the NDA is officially lifted. In the next couple of days the Darfkall pre-orders will open up and stay up until right before Darkfall’s launch on February 25th or until they are sold out. This is how the pre-order will work:

The pre-order consists of the Darkfall client digital download along with a month of play starting on February 25th. The full cost for this is 42 Euro. This amount WILL NOT be charged during the pre-order. What will be charged is an initial 2.52 Euro non-refundable payment to activate the process. The remainder (39.48) of the pre-release price will be billed on release, February 25th. You’ll be free to cancel the purchase any time before the additional charge goes in on February the 25th.

Darkfall’s monthly subscription is set at 11.77 euro. A 3 month subscription with a 10% discount and a six month subscription will be offered with 15% discount on the monthly subscription rate.
 

Read more here.