So I said before about the new world generation always being jungles, the server I have ended up giving me what seemed like an endless snow plains with about 2 trees and 3 sheep. No other animals, and was probably the worst world I've ever had. I tried something else and ended up with this:
[fyi: WorldEdit wand has nothing to do with the terrain]
It's now pretty much that, but everywhere. It's awesome.