  In SUSY models, it is still possible to have large signals even if the
current data on $K$ and $B$ systems are consistent with the CKM paradigm for
flavor mixing and CP violation. I first discuss $b\to d$ and $b\to s$
transitions including time-dependent CP asymmetries in $B_d \to \phi K_s$, and
usefulness of $B_s \to \mu^+ \mu^-$ to distinguish various SUSY breaking
mechanisms. Then I will discuss some possible connections between B physics and
cosmology: (i) B physics and electroweak baryogenesis within SUSY models, and
(ii) the correlation between the neutralino dark matter scattering and $B (B_s
\to \mu^+ \mu^-)$.
