Back when we were working on Bukkit, when Dinnerbone and the other three were aquihired? by Mojang, one of the main things they wanted to do was implement a pro

Back when we were working on Bukkit, when Dinnerbone and the other three were aquihired? by Mojang, one of the main things they wanted to do was implement a proper modding interface into the game. Lots of things conspired to make that not happen, undoubtably including feature creep (because it was going to be the official mod api, it had to be correct not just good), but it finally looks like they're moving in that direction.