The MongoDB team is very excited to announce the release of MongoDB 1.4.0. This is the culmination of 3 months of work in the 1.3 branch and has a large number of very important changes.
Many users have been running 1.3 in production, so this release is already very thoroghly vetted both by our regressions systems and by real users.
Core server enhancements
Replication & Sharding
Deployment & production
Query language improvements
Full Change Log: jira
Release Notes: http://www.mongodb.org/display/DOCS/1.4+Release+Notes
Thanks for all your continued support, and we hope MongoDB 1.4 works great for you.
As always, please let us know of any issues,
-Eliot and the MongoDB Team