To copy and paste my Twitter rant:
PSA: If you're getting excited about that new Commodore Amiga, stop. It's just a Linux box with an Amiga logo A modern successor to the original Amiga does exist, though. It's called the AmigaOne, and it runs the latest AmigaOS. Hyperion owns AmigaOS, and is actively developing a modern version; Commodore owns the Amiga name. That's it.
See here to learn more about the AmigaOne:
http://en.wikipedia.org/wiki/AmigaOne
There's even a netbook on the way. Fancy that, a portable AmigaOS machine!