We had a "9/80" schedule here at the LA Natural History Museum
until late last year:  work 80 hours over 9 days in each two-
week pay period.  Staff loved it because all but managers had
every other Monday off.  As a manager in charge of research
and collection effort for a project on a highly accelerated
schedule, I hated it.  Ten percent of the time I only had
half the staff available.  The biggest problem was
communication, a critical need in project management, perhaps
slightly less critical under "normal" circumstances.
 
Matt Roth