Per my last blog post on the topic, I've now added my "Design Suggestions for a Corporate Blog Portal" to The New PR Wiki. There is now a "Corporate Blog Portal" page which includes the suggestions I've blogged about here, as well as some examples and a placeholder for links to software.
Feedback would be definitely appreciated! What do you think about these suggestions? Are there other items you think should be on the list? Do you have examples of corporate blog portals that you thought were really well done?
Please feel free to leave suggestions as comments here on this blog post, email me, or make the edits directly in the wiki if you have the password. If you don't and want to edit there, please feel free to email me.