This is pretty frustrating. I followed the GettingStarted instructions on the PlayN page and everything works fine from the command line but I keep getting errors when trying to create a skeleton PlayN maven project in eclipse. I'm running this on a Mac OS X and eclipse 4.2.0 classic.
Unable to create project from archetype [com.googlecode.playn:playn-archetype:1.3.1]
Under details it says: The defined artifact is not an archetype