Since back when I lived in Germany and came across with this Swedish brand - Stokke - I got fascinated by some of their things, and one of the best creations of theirs is this crib:
They also have a changing table from the same line. (I'm not a fan of changing tables -> unsafe)
Plus, they use organic materials.
Other eco choices are:
Since I'm trying to be eco, I think the best is really not to buy any baby bed at all. And if really needed, I still have my own at my parents...
And I could not finish this without talking about the most famous finnish cribe: The Cardboard Box: