I just saw this vid (http://www.youtube.com/watch?v=cl3_OLFfbfg), is about this mod, Aether, that creates a heaven-like world... I tried to download it but I saw no .jar! Is this mod only for singleplayer or there is also a plugin for a multiplayer server?
BUT there is something that mods it to be LIKE the aether, how he did it baffles me, but im looking into it: http://www.youtube.com/watch?v=YBaI8eTHnFw