It doesn't look like the rocks fit in too well, but the rest is great!
the hills and little islands are 1st class, the horizon is also really good :] but if You would put more work into the water and sky, whole piece could have been so much better! great work, anyways :]
Prior to this sprite I used to only work with small sprites, which is why the background is probably a lot nicer than the front. And yeah, I kinda don't like the rocks as much. I was planning the submit the picture without them, since the preview didn't have them.
The icebergs could benefit from some contrast.
I also feel the water needs a redoing. I wouldn't be able to tell it's water without the context. (Icebergs, horizon line, Islands in the back)
I really do like the top-half of the picture, though.
Awesome background, but I agree with Shannon, the icebergs look a bit flat.
Nice colors! I think that it would look much better if you took off the really dark lines around the icebergs(i know they're rocks in the pic, but I assume you wanted them to be ice because they're blue, right?). the dark lines completely flatten out the icebergs. I think it would also make a better piece of art if you made it so that the icebergs were on the right side- that black takes up an awful lot of attention and there isnt much going on on the right hand side atm...
wow, great detail and texturing