Pegby Lets You Collaborate Online

I saw this neat little app on The Pursuit of Technology Integration Happiness and I have to say it's a great way to work with your colleagues on a project. The premise is simple: create a card, put it on your board, design the number of columns you want, add more cards to your "stack" and share with others.
Here's a quick video which shows Pegby:

Pegby in Two Minutes from Pegby on Vimeo.