  In cosmic holography, the fundamental quantity is the degrees of freedom on a
horizon surface rather than the material contents within the volume. That is,
the horizon area and hence cosmological expansion rate H is related to the
entropy. Using this as a guide, we examine the consequences of an effective
dark {\it entropy} on the past and future dynamics of the universe. The
results, including nonmonotonic expansion behavior, are interesting apart from
the theoretical motivation.
