My players may soon find themselves in the Astral Sea. I don't know much about the area, but if that's where the adventure goes, so be it. Only problem is I find the 4e Manual of the Planes to be woefully uninformative. Are there any published adventures or modules that take place in the Astral Sea? Even if they aren't appropriate for my game, reading one would probably give me a better ideas of what I can do to the players out there.
I'm running 4e and would prefer 4e material if it's available. But I'm open to reading adventures set in the Astral Plane from earlier editions as well if that's the best that's out there.