The current stable release for maven 1.x is version 1.1, obtainable from the download page. No further development is planned for the 1.0 branch, and 1.1 is in maintenance mode, i.e. development is restricted to bug fixes.
The list of unresolved issues / enhancement requests for Maven 1.x can be browsed under the MAVEN JIRA project.
Most development on Maven is now done on the 2.x branch. Please visit the main Maven web site for information on Maven 2.
Maven 1.1 has been released, you can download it here.
The main changes with respect to Maven 1.0.2 are:
With just a few exceptions, Maven 1.1 is backwards compatible with Maven 1.0.