  In these proceedings we give a concise review of some selected
flavour-violation processes and their implications for two-Higgs-doublet models
(2HDMs) and the MSSM. The processes under investigation are $\Delta F=2$
processes, $B_s\to\mu^+\mu^-$, $b\to s\gamma$, and tauonic $B$ decays. For each
process we show the impact on the models.
