I wanted to get the Jalopy plugin to format my source code, and promptly failed to get the snaptshots from the mojo projects without the help of this resource,
this resources helped me to get the codehaus mojo snapshot plugins:
What to put in settings.xml
after that I could simply run:
mvn -Pcodehaus jalopy:format
As I was bothered by the command line cluttering by -Pcodehaus, I actived the profile by adding <activeByDefault/> into the activation tag in the profile definiton for the "codehaus" profile.
... and voila! Jalopy formatted my sources.
See also: maven Jalopy plugin
Very helpful for the "other" reports was an interesting java world article...
I also wanted JDepend to check my project, to I added Jdepend.