  Microlensing is sensitive to binary, brown dwarf, and planetary companions to
normal stars in the Galactic bulge with separations between about 1-10 AU. The
accurate, densely-sampled photometry of microlensing events needed to detect
planetary companions has been achieved by several follow-up collaborations.
Detailed analysis of microlensing events toward the bulge demonstrates that
less than 45% of M-dwarfs in the bulge have Jupiter-mass companions between 1
and 5 AU. Detection of binary and brown-dwarf companions using microlensing is
considerably easier; however, the interpretation is hampered by their
non-perturbative influence on the parent lightcurve. I demonstrate that ~25% of
brown-dwarf companions with separations 1-10 AU should be detectable with
survey-quality data (~1 day sampling and ~5% photometry). Survey data is more
amenable to generic, brute-force analysis methods and less prone to selection
biases. An analysis of the ~1500 microlensing events detected by OGLE-III in
the next three years should test whether the BD desert exists at separations
1-10 AU from M-dwarfs in the Galactic bulge.
