You don’t have to be a german citizen, you just need to register with a valid email address. There are several steps necessary and they ask you to download a mp3-download- program before actually buying the songs… It would be a little complicated to describe all the steps here, so, as I expect your english to be better than your german, I’d suggest to get it via the english page:
I’m agree with GBD. I have to stay away from any leak or song until I can hear the complete album from beginning to end, with the best quality. But I must say, it’s hard… Fortunately the album is out soon! If I’m lucky I get it in my mail box today or tomorrow.