Did you know we CTP'd a new Undo/Redo framework with our last release?  Well, we did!

And we'd love to get feedback from you--do you think it's useful? How would you use it? How would you change it?  That sort of thing.

Here's a quick rundown of the key features:

• Undo/Redo History Stacks – The UndoManager automatically manages the Undo/Redo history stacks. The collections raise change notifications and therefore…