The maven team is pleased to announce the Maven Multi-Project Plug-in 
1.4-SNAPSHOT release! 

http://maven.apache.org/reference/plugins/multiproject/

A plugin to handle the building of multiple projects within maven. Requires 
Maven 1.0 RC3 

Changes in this version include:

  New Features:

o Add multiproject:site-deploy Issue: MPMULTIPROJECT-33. 

  Fixed bugs:

o Document multiproject dependency convergence report Issue: 
  MPMULTIPROJECT-41. 

  Changes:

o Deprecate dependency handle  

To automatically install the plugin, type the following on a single line:

maven plugin:download 
  -DgroupId=maven 
  -DartifactId=maven-multiproject-plugin
  -Dversion=1.4-SNAPSHOT

For a manual installation, you can download the plugin here:
http://www.apache.org/dyn/closer.cgi/java-repository/maven/plugins/maven-multiproject-plugin-1.4-SNAPSHOT.jar
         

Have fun!
-The maven team