Dio is a very cool new (beta) site for creating a interactive environment. I can see this being used for those interested in programming or game/story development. It also reminds me a bit of those sites that create choose-your-own adventures such as Inklewriter. The environment itself is a series of still images that a person can navigate around (Think Myst). Also, a person can select items to examine (again Myst or 7th Guest) and even collaborate w/ others via a chat window.
I recommend checking out Dio by clicking here!!!
Below is a brief video...
Thanks to Larry Ferlazzo's wonderful blog for the tip!!!