At moderate to large tanā, down-type quark mass matrices and Yukawa
couplings cannot be diagonalized in the same basis.  It generates
flavour violating couplings of neutral Higgs bosons. These couplings
lead to Higgs-mediated contributions to Bs -> ģ+ģ- and Bd -> tau+
tau-. We evaluate the branching ratios of these decays in the framework
of minimal gravity, gauge- and anomaly-mediated SUSY breaking models and
also SU(5) with non-universal gaugino mass parameters at GUT scale. We
show that they are in the experimentally interesting range, possibly
observed at the Tevatron or B factory.