Mods are already capable of doing pretty amazing stuff in minecraft. Hopefully this makes them easier to develop and keep up to date, and easier to use for us players
I know and this is not what is interesting about the API. What's interesting is that it sounds like the first mod tool everybody could use. Like LittleBigPlanet piss easy. This could be a major feature and a first for a PC game really. And with the popularity of Minecraft it could work extremely well and fuel life into the game for a decade! I mean, it could easily give some World of Warcraft type of very long legs to the game.
Anyhow, I am excited to see it all happen. It's too interesting to ignore. I also fear for my own life already, I might just be messing around in this tool forever...
(oh wait, I don't have a life! yay!! )