Update (2010-01-09): So turns out wpengineer.com had this figured out a while back (i.e. October 2008). Regardless, it was a good opportunity for me to dig into the WordPress core and figure out what's going on.
This is the outcome of a couple of hours of Friday night coding after an open call by Chris Coyier over at Digging into WordPress. Here's what Chris asked for:
This past weekend, we released the beta version of Stage 1 (Custom Post Statuses) of the Edit Flow Project, a plugin aiming to improve the WordPress Admin Interface for a multi-user newsroom's editorial workflow.
Today, I released the first public version of the Co-Authors Plus plug-in for WordPress, which allows multiple authors to be added to Posts and Pages. The plug-in is an extension of the Co-Authors plug-in created by Weston Ruter.