I've modified the original class to use the new API as specified by Dinnerbone here https://gist.github.com/anonymous/20d0a4156ea603fba8c3
Multiverse was first done by bukkit (multiverse on a minecraft-server based server), world generators were done by bukkit some time after, also...
It would require editing the outgoing packages, and a modded client mod so the animals are server-based, instead of client
It would require a custom version of bukkit and the mod, since each new mob represents a new entity that has to be handled by the server.
Wouldn't just disabling ghasts do that?
All colors are one block, the custom colors haven't been implemented yet
They are working on the update, this update added new blocktypes to the game and added a few options to others (dyes are an example), they have to...
Dinnerbone (one of the makers of stargate) is working on bukkit mostly atm, he has said to be porting it, and was talking about the toll system...
Separate names with a comma.