Preliminary heavy-light decay constants from the MILC collaboration
  Preliminary results from the MILC collaboration for $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$ and their ratios are presented. We compute in the quenched approximation at $\beta=6.3$, 6.0 and 5.7 with Wilson light quarks and static and Wilson heavy quarks. We attempt to quantify systematic errors due to finite volume, finite lattice spacing, large $am$, and fitting and extrapolation uncertainties. The hopping parameter approach of Henty and Kenway is used to treat the heavy quarks; the sources are Coulomb gauge gaussians. 
C. Bernard, T. Blum, A. De, T. DeGrand, C. DeTar, Steven Gottlieb,   U.M. Heller, N. Ishizuka, L. K\"arkk\"ainen, J. Labrenz...