I bought mine on CDKeys (very similar to GMG) and am still waiting on my Steam unlock. Not like I care that much since I'm still in the middle of a DS2 playthough.
Did you already receive your key from CDKeys? Anyone else purchase via CDKeys get your key yet?
Still waiting on mine and I pre-ordered back in Dec/Jan. Considering the game goes live tomorrow at 7pm EST, usually CDKeys emails them out 48hs prior -- especially if their is a preload.