Thanks to the work of John Ament, Metrics is now using the new release process and has just released version 1.0.1.
The "only" change of this the addition of a large number of TCK tests so that implementors can better test their implementations.
1.0.1 is currently only on Sonatype - My understanding is that this will be synced to maven central at some point in time.
A big thanks to all the helping hands, that have contributed code and 'consulting' on Gitter and the calls. And a very big thanks to John for making the release process so easy now.