21Publish has a new whitepaper (PDF) on Group Blogging.

It covers:

"This whitepaper helps to introduce group blogging to organizations.

As part of this introduction, this paper will:

- highlight why and how corporate group blogging is important
- explore some sample group blogs used by organizations
- identify some essential elements and common pitfalls to group
blogging
- outline how one might think about selecting a technology
platform for group blogs

By better understanding the forces and concepts outlined above, one
can make group blogging more successful than individual blogging
(or at least complement individual blogging)."

Check it out - its free (no registration necessary).