  It is suggested, by using a covariant lagrangian formalism to estimate the
equation of state $w = p/\rho$, that stringy dark energy predicts $w < -1$, a
negative pressure larger in magnitude than that for a cosmological constant or
quintessence. This would lead to a later transition from decelerating to
accelerating cosmological expansion; $w = - 4/3$ is briefly considered as one
illustrative example.
