Sacha Writes

"Microsoft has announced plans to release the code of its Web Sandbox project under the open source Apache Software License.

The Web Sandbox project aims to mitigate some of the security risks that are associated with building Web mashups that mix in untrusted content from third-party sources. The task of isolating untrusted code poses some complex technical challenges. Web Sandbox is one of several ongoing research projects that are implementing experimental solutions."

More Information: http://arstechnica.com/microsoft/news/2009/01/microsoft-asks-open-source-developers-to-play-in-web-sandbox.ars