Although I don't know much about this I do know Microsoft have bought Mojang for 2.5 billion dollars and at the same time C418 put out this miniature album:
It... Kinda feels like a goodbye
Not a particularly happy one either. It's name sounds like a relation to Notch's cancelled game '10 to the power of the C'
If Microsoft do anything bad with Minecraft they will hear though the arse about it so lets hope they don't. Not much else we can do!
Let's hope that at least they get the damn modding API soon