Najo said:I thought there was also an ethereal plane
We've heard no mention of an Ethereal plane in the 4th Ed cosmology that I'm aware of. I believe the only planes, or whatever they are called now, that have been mentioned are the Astral Sea, the Feywild, the Shadowfell, the Elemental Chaos (which included the Abyss) and Dominions (Hell etc) that float in the Astral.