Slashdot has posted one the more positive Microsoft posts I can remember in recent time discussing the release of Web Sandbox source code from folks from Live Labs.

History

The Web Sandbox builds upon Microsoft’s experience with DHTML, Windows Live web-based gadgets, and the Microsoft Research BrowserShield project which pioneered JavaScript virtualization through rewriting. Live Labs worked with individuals and groups across Microsoft to build the technology preview announced at PDC 2008. Since then, Microsoft have open-sourced the framework and are partnering with other industry leaders to evolve Web Sandbox into an industry-wide solution.

How can you help?

Microsft want you to get involved. Microsoft created a cross-browser JavaScript virtualization layer that provides a secure standards-based programming model without requiring any add-ons. We are not done yet. We need your help: experiment with the Sandbox and make sure it works. We've included a set of samples so you can try to break the Sandbox. The goal is to provide reusable components that will allow you to secure your Web 2.0 mashups. Microsoft’s goal is to work together to standardize a secure web platform.

If you’d like to contribute to the project, visit Live Labs Web Sandbox page