Quoting Dinnerbone's blog: "The first two steps are essentially deobfuscation, and the third is almost rewriting the entirety of Craftbukkits net.minecraft.server section. That's a whole lotta code. We have some very fancy tools written by ourselves for assisting during this, but it's mostly manual hard work all around. "
Seriously? Between a random forum member, and a BukkitDev staff member you don't know which one to pick?