If you haven't already you all need to go and check out the Scratch 2.0 Prototype site.
It is simply amazing. I have posted about scratch before and the great things that you can do with it.
2.0 adds some great functions. Motion sensing using a webcam - so you can achieve XBOX Kinect like effects. Go and switch your webcam on and pop some balloons.
It also allows you to work on-line completely which means you can open others work and remix and edit it all on the fly. Its great.
Also you can also define your own programming blocks.
Check it out its only open for one more day as I type this. I can't wait till this is released next year.
Check out this short video I made in case you miss the site.
and their official video explaining some of the features.