" We need to create a completely different, much more secure solution. This is going to take some time, and we’d appreciate your help. Please email to the gimp-web@ mailing list, if you want to help us."
The registry has been in read only mode for a long time. We need a better solution than the website. @Jehan has started working on something, which is awesome.
I think I posted a copy of the registry on the pixls.us github if you want to download it.
Also, @Jehan has already started architected and is working on an extension system for GIMP directly from within GIMP (there will be a new website as well once I can get some time to build something for him).