Best of all you can download it, find documentation, and examples all right here
Other developers are already exploring EaselJS and have created posts and videos to help you get started.
- how to build a game with EaselJS
- Drag and drop shapes with EaselJS
- Create a picture gallery with EaselJS
The resources are there and waiting! Check it out! Then build a game, find out how to publish your game to Windows 8 and tell me when you do so I can try it out! You might even want to enter your game in Imagine Cup.
Here are a few examples you can explore to see what the APIs will do for you so you can start drooling, I mean coding!