  Since the IAU XXIV meeting in 2000, the CMB anisotropy has matured from being
one of a number of cosmological probes to forming the bedrock foundation for
what is now the standard model of cosmology. The large advances over the past
three years have come from making better and better maps of the cosmos. We
review the state of measurements of the anisotropy and outline some of what we
have learned since 2000. The recent advancements may be placed roughly into
three categories: 1) What we learn from the CMB with minimal input from other
cosmic measurements such as the Hubble constant; 2) What we learn from the CMB
in combination with other probes of large scale structure; and 3) What we learn
by using the CMB as a back light. Future directions are also discussed. It is
clear: we have much more to learn from the CMB anisotropy.
