Amazon.de offers a excerpt of the soundtrack (5 titles) as preorder bonus for the Day-One-Edition. They say, that the CD comes packed in the Day-One-Box. This lets me speculate if all Day-One-Editions have this excerpt or if this is really an exclusive feature of Amazon.de. The next interessting question is if the Collector's Edition gets this CD, too.

Can anyone answer this?

Can't answer your question. But if you buy it for pc you can just search all the soundtrack from your skyrim folder. Right?

The Morrowind soundtrack contained files that weren't in the game. I think here it will be similar.