Hi Winston & Flashart,
It's already out in English (I picked up a DVD in the Czech Republic that offered English language as well as Czech) in some European countries though I haven't seen any Blue-Ray versions yet. You might be able to find it on mail order.
If you're looking for historical accuracy then you'd be severely disappointed, but if you're looking for a "ripping yarn" in the same vein as Flyboys - then this is for you.
IMHO: The fight scenes are not as dramatic/cinematic as Flyboys but more convincing.
I see it as a German compliment to the (Allied focussed) Flyboys movie and enjoyed it thoroughly.
However, I think it's one for WW1 fans only and I doubt you'd get your girlfriends/wives to sit through it. (My wife ran out of the room as soon as she saw the bi-planes).
Toodle-pip!