This post doesn't have a lot of information--just about something really cool I just saw:
Just came from a presentation on a project using a game design package to help teens develop job skills. (A joint project of Science Museum of Minnesota, Hennepin County Library and Minneapolis Public Library--funded by Best Buy Children's Foundation.)
Scratch is a game design system that uses the Logo operating system. Developed and supported by MIT Media Lab, it has a Windows and Mac version, will have a Linux version and will be on the One Laptop Per Child project laptops.
Scratch lets kids use programing to" create stories, games and animations." It has a sharing website that uses the creative commons license. The discussion by kids on ownership and building on other's programs has revolved around giving credit where credit is due and attribution.
It may surprise some but seeing a room full of librarians really excited about game design software wasn't at all surprising to me.