What is Maven 2?
Maven 2.0 is a complete rewrite of the ‘original’ Maven application (‘Maven 1’). As such, it is very different from Maven 1, and not backwards-compatible (eg, it cannot execute Maven 1 plugins). However, Maven 2.0 is the latest stable release of the Maven application, and new users are generally encouraged to use it for all new projects. If you are familiar with Maven 1, you can find some information about moving to Maven 2 here or on the main Maven site.