Scratch 2.0 has recently been released albeit in Beta format and I am looking forward to trying it out with Code Club. Here are some links and videos to bring you up to speed.
I find that I keep watching this video from Mitch Resnik from MIT, the developer of Scratch and Scratch 2. It is worth watching until near the end where he showcases some of the features of Scratch 2.0. These are broken down more clearly in the second video below.
I have seen Miles Berry and others demo some of the new features in version 2, but this has to be the most comprehensive breakdown of what to expect.