  During the past year the MILC Collaboration has continued its study of
heavy-light meson decay constants with three dynamical quarks. Calculations
have been extended to a second lattice spacing of about 0.09 fm. At this
lattice spacing, there are results in the quenched approximation and for three
sets of dynamical quark mass: m_l=m_s; m_l=0.4 m_s and m_l=0.2 m_s, where m_l
is the light mass for the u and d quarks and m_s is the strange quark mass. At
the coarser lattice spacing, for which results were presented at Lattice 2001,
statistics have been increased for two sets of quark masses and three
additional sets of quark masses have been studied, giving a total of eight
combinations used to interpolate between the quenched and chiral limits. When
these calculations are completed, we can study the decay constants taking into
account both chiral and continuum extrapolations.
