I recently examined an interview of Jeb and the bukkit representatives. It appears the new API will make multiplayer servers more mod-compatible and friendly, allowing players to download a server's mods if they wish and the server would be able to read clientside mods as plugins which is good hint that administrative staff of a server will be able to enable what mods a player uses as well as what mods he is running on his client, meaning a moderator could tell if someone is running Ellians or Xray mod then he/she can disable it once he joins a server. I think this could either make or break Kreatious; Personally I think servers that run certain mods like flan's mod or fantasy oriented mods will have good chance of out competing us due to our lack of mod familiarity.
So people, What mods would you like to see on kreatioUS if this does happen, Name the ones that you have tried and tell us what you like about it (Like mo'creatures and all that, No Mo'Explosives, Zerg knows what I will do with a nuclear missle, Frost becomes crater city).