Although this all sounds great, there's one observation that can't be explained by theory. The amount of CMB radiation spotted near clusters of galaxies is greater than expected. According to theory, CMB photons should interact with these clusters, getting kicked to higher energies. WMAP cannot detect these higher energy photons, so there should be a deficit of CMB photons around clusters. This is not the case and scientists will probably be confused by this for some time to come.
WMAP continues to open our eyes to the nature of our universe by measuring the Big Bang echo, supporting current theories about how the cosmos started out, but challenges other theories as to how CMB radiation should behave. Although the WMAP mission is set to end in the fall of 2010, its results will reverberate for years to come.
*The uncertainties in the measurements don't come from astronomers lack of accuracy, far from it. When measuring cosmic times and distances, very slight errors may creep into the calculations. Some errors might be down to slight instrumental irregularities or fuzziness in datasets, so as a matter of good practice, scientists calculate a "margin for error" in their results. Ideally this margin should be as small as possible, but it will never disappear all together.