New Minecraft product is being released today! It's called Z5Craft. It's a server plugin system like Bukkit, only different. Z5Craft is technically a wrapper, which means you don't have to wait for it to get updates; it's always compatible with any version of Minecraft. Also, plugins written for Z5Craft won't break. This means you can write a plugin now and still have it work 6 months from now. Head over to Z5T1.com/Z5Craft to download it!
Note: Z5Craft does not work on Windows.