That's pretty amazing. It's like Interface Builder but for Cappuccino ... and as a web app. I can't believe how awesome these guys are, I hope Apple acquires them and starts using their technology for MobileMe + iWork.
If you knew anything about what happened to WebObjects, you would be hoping that such a scenario never occurred.
I know that Apple pushed WebObjects to the back burner when they acquired NeXT in the mid 90s but I'm not sure why it would be bad for them to buy 280 North today.