The plugin 'org.fornax.maven.plugin:fornax-buildhelper' does not exist or no valid version could be found

Hi,

This error is driving me crazy.  When I try to build fornax-cartridges-sculptor-parent as instructed in the Developer's Guide, I get:

[INFO] Scanning for projects...
[INFO] Reactor build order:
[INFO]   Fornax Cartridge: Sculptor
[INFO]   Fornax Cartridge: Sculptor Textual DSL
[INFO]   Fornax Cartridge: Sculptor Metamodel
[INFO]   Fornax Cartridge: Sculptor Generator
[INFO]   Fornax Cartridge: Sculptor Runtime Framework
[INFO]   Fornax Cartridge: Sculptor Runtime Web Framework
[INFO]   Fornax Cartridge: Sculptor Maven Archetype
[INFO]   Fornax Cartridge: Sculptor Maven Archetype for Web App
[INFO]   Fornax Cartridge: Sculptor Maven Archetype for JSF Web App
[INFO]   Fornax Cartridge: Sculptor Maven Archetype for EAR
[INFO]   Fornax Cartridge: Sculptor Maven Archetype for parent project
[INFO]   Fornax Cartridge: Sculptor Maven Archetype for standalone project
[INFO] ------------------------------------------------------------------------
[INFO] Building Fornax Cartridge: Sculptor
[INFO]    task-segment: [clean, install]
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] The plugin 'org.fornax.maven.plugin:fornax-buildhelper' does not exist or no valid version could be found
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: The plugin 'org.fornax.maven.plugin:fornax-buildhelper' does not exist or no valid version could be found
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1303)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindPluginToLifecycle(DefaultLifecycleExecutor.java:1238)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(DefaultLifecycleExecutor.java:1004)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:477)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:287)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.version.PluginVersionNotFoundException: The plugin 'org.fornax.maven.plugin:fornax-buildhelper' does not exist or no valid version could be found
        at org.apache.maven.plugin.version.DefaultPluginVersionManager.resolvePluginVersion(DefaultPluginVersionManager.java:229)
        at org.apache.maven.plugin.version.DefaultPluginVersionManager.resolvePluginVersion(DefaultPluginVersionManager.java:91)
        at org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:171)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1274)
        ... 17 more

I have banged my head against this all morning because I thought I broke something.  Then I thought I'd look in the forums.  It seems like this is caused by the m2 repository being down?  Can someone please help?

Thanks!
--Polly