Yahoo Groups

Self-Publishing

This group has almost 3000 members, consisting of owners of small presses and authors who are publishing their own work.

Pod Publishers

The description of this group states that it is not for first-time authors who want to publish a book using print on demand, but for POD publishers who intend to publish multiple titles and own their own ISBNs. Nevertheless, you can learn a great deal by listening in on the discussions. If you have started your own publishing company and bought your ISBNs, you qualify for membership. The group has about 1400 members.

Publishing and Promoting

This group of around 1,000 members focuses on marketing.