Very much looking forward to this. The Finnish team behind it produced Star Trek spoofs, the Star Wreck series, culminating in the full-length 'Star Wreck: In The Pirkinning' (it took them seven years, the render farm was three PCs in a kitchen!), available on DVD and as a torrent. I loved that, so Iron Sky should be right up my street. And Udo Kier's in it too
Oh yes, they have cinema releases scheduled: UK April 20 (funny coincidence, that was Hitler's birthday....!).
The Guardian gave it a rather sniffy review, I agree with one of the comments: "I refuse to believe you can make a bad film about Nazis from the moon. I'm sorry; it's just not possible."