MongoDB 2.0 Released` The MongoDB team has announced the release of version 2.0, which includes numerous new features, improvements to existing features, and performance enhancements. This is a significant release that addresses concurrency issues, improves index size and performance, enables authentication with sharded clusters, and introduces various other features such as journaling by default, user-defined getLastError options, and geo-spatial features. The release also includes several performance-related improvements, including smaller default stack sizes to accommodate more connections and improved replica set operations. The MongoDB team encourages users to explore the change log for a comprehensive overview of the new features and improvements in this release.