  We perform a comparison of the WMAP measurements with the predictions of
quintessence cosmological models of dark energy. We consider a wide range of
quintessence models, including: a constant equation-of-state; a
simply-parametrized, time-evolving equation-of-state; a class of models of
early quintessence; scalar fields with an inverse-power law potential. We also
provide a joint fit to the CBI and ACBAR CMB data, and the type 1a supernovae.
