The second release of the grails-maven-plugin is now available. You'll find the full list of changes on jira
In this release you can now use this plugin for maven 2.0.5+ with grails 0.5.6 and 0.6. For those 2 versions you'll find all-in-one POMs for grails. Dependencies used by grails but not available on the central repository are defined with a system scope (maven will load them from your grails installation). More important we deployed this version of the plugin on the central repository which simplify enormously its usage (just 3 lines to add in your user settings)
Don't hesitate to report issues and propose enhancements on our tracker and on our mailing list.
Have Fun with Grails and Maven.