  The first three years of observation of the Wilkinson Microwave Anisotropy
Probe (WMAP) have provided the most precise data on the anisotropies of the
cosmic microwave background (CMB) to date. We investigate the impact of these
results and their combination with data from other astrophysical probes on
cosmological models with a dynamical dark energy component. By considering a
wide range of such models, we find that the constraints on dynamical dark
energy are significantly improved compared to the first year data.
