It's evidently still in development.
Not really, it has been finished for over a month. The delay was caused because some fellow HH'ers were trying to get a definitive answer from Meridian regarding firmware updates for older equipment. As expected they only got the usual answer ...
@Robert,
The tested column indicates if the updated firmware has been tested on real hardware. So far it has only been tested with the G68 and it worked perfectly fine. It should also work perfectly fine on the other mentioned equipment, however we only know for sure if someone actually tried it.
Anyway, download link is added.