We present an update of results from the HPQCD collaboration on charm physics using
the Highly Improved Staggered Quark action. This includes a precise determination
of m_c using moments of current-current correlators combined with high-order continuum
QCD perturbation theory. We also include an update on the determination of alpha_s
from lattice QCD, preliminary results on the determination of m_b and a summary plot
of the status of the gold-plated meson spectrum. There is an appendix on tackling
systematic errors in fitting using the Bayesian approach.