I'm pretty much in the same boat with my fiancé :/ I already picked Steam and didn't realize there was a shipping delay at all. Now we're not sure what to do (or who is even getting the Steam copy). Hoping another key may be given out for those stuck waiting because I don't understand how it could be said that nobody would be kept from playing if the only code given out was the Digital Only extra code and not for the physical game coming.
I mean, I can't see many people honestly pledging for a tier with more than one version of the game if they weren't planning to give one version to someone.
Edit: @Uomoz - Unfortunately, it doesn't let you play together at the same time which kind of ruins the entire point.