There is quite some anti-mavenism going around, about plugins suddenly not working, etc. And often this is true, case in point: maven-eclipse-plugin version 2.6 botched all projects working with Wicket by being very anal about what should live in the src/main/java directory tree (only Java files! God forbid you'd like to put web resources such as .properties (i18n for your web components), .js, .css, .html, etc next to your Java files. This version not only broke Wicket projects, but AspectJ as well.
Fortunately, the Maven community (more specifically Barrie Treloar and Arnaud Heritier) were helpful in finding the root cause of our pain: a conflict in merging the resources paths during the classpath generation.
With the latest snapshot of maven-eclipse-plugin 2.7 we now have our old build stability back, and can enjoy the new features of the maven-eclipse-plugin, such as searching your workspace for projects that are snapshot dependencies, and adding a project link instead of a jar dependency.
Yes, maven can sometimes be a pain, but ultimately with a great supporting and responsive community it will deliver. Many thanks to Barrie and Arnaud for being patient with us.