The Maven team is pleased to announce the Dashboard plugin 1.0 release!

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

This plugin generates a dashboard HTML report containing information 
gathered from other Maven reports (Checkstyle, Clover, JUnit, Simian, 
etc). The dashboard aggregate this information for all subprojects, 
presenting them in a single tabular format.

Features:

o Pluggable architecture. It allows to add custom aggregators for any
  kind of report, be them Maven reports or anything else (like 
  calling an SCM system, calling JIRA, etc). An aggregator is actually 
  a Jelly script so that you have the full power of Jelly at your hand.
o Allows tight integration in one's own custom reactor and prevents
  running reports several times.
o Several aggregators are provided out-of-the-box:
  o csall: reports Checkstyle warnings/errors
  o cswarnings: reports Checkstyle warnings
  o cserrors: reports Checkstyle errors
  o clovertpc: reports Clover total test coverage percentage 
  o cloverloc: reports lines of code as computed by Clover
  o cloverncloc: reports lines of non-comment code as computed by Clover

Note that this plugin has been tested with Maven 1.0 rc2 from CVS HEAD. 
Using it with another version of Maven is at your own risks! :-)

An example of the Dashboard plugin in action is available here:
http://maven.apache.org/reference/plugins/optional/dashboard-report.html

You can download the Dashboard plugin here:
http://www.ibiblio.org/maven/maven/plugins/maven-dashboard-plugin-1.0.jar

Have fun!
-Vincent