Now, I'm not really sure why you'd want to do such a thing. It seems like desktop applications are trying to migrate to the web, not vice-versa. (One reason might be to access data offline, which I suppose would be a boon to business travelers in between wi-fi hotspots. Another reason is that the application has access to the local file system, so you could drop-n-drag desktop files into the application, rather than repeatedly click a "browse" button and tediously navigate your file system.)
- Download and install the Adobe AIR beta 2 installer (Mac or PC)
- Download and install the magic eight ball
It shows up with an eight ball icon on your desktop. How funny is that?
Edit: I've put the instructions on my site as well. Put Osric's Magic Eight Ball on your Desktop