First, thank you for your kind response. We are trying to build an open-source community around existing open-source software too, so we appreciate your help.
While I think it is a great idea to encourage people to use PM today, it is likely that sometimes the projects must be edited after publication. For example, other users may point out potential issues or ask for more documentation. In those cases, it would be much better if multiple users besides the official author could edit the post.
I wonder how challenging this feature would be. We are also happy to contribute some code or an extension if that is not too difficult - and if someone could point us to appropriate places in the repository.