Since the catalog of Maven archetypes is substantial, and the archetype plugin interface is so abysmal, Forge could benefit from being a stand-in replacement to archetype:generate. A command in Forge to create a new project from a Maven archetype would certainly offer a nice complement to the more basic "new-project" command. It could just be an additional flag to the new-project command, such as:
new-project --named MyProject --fromArchetype org.jboss.weld.archetypes:jboss-javaee6-webapp
Using the interactive prompts, you may be able to provide a list of archetypes, perhaps w/ a filtering mechanism. You could also just do a best guess based on what's found in the catalog.
new-project --named MyProject --fromArchetype jboss-javaee6-webapp
You could just delegate to Maven by building up the "mvn archetype:generate" command from Forge. Long term we could consider emulating the archetype:generate plugin so as just to consume the projects that are out there already w/o any linkage to Maven.