I am beginning a project that is a social network with seller roles. This module seems like the only option for what I'd like to do. In addition to using Drupal 6, I'll also be using the uc_node_access module, since the seller is only selling access to a page that they set up.

I'm very interested in the answers to your questions and the estimated release of the D6 version.

Keep up the good work folks. I'll certainly try to contrib to this project if I have time and can figure things out too.

Thanks!