We discuss the twofold role of flavor and CP violation as a constraint in
model building and as a signal of SUSY. Considering as an example b to s
transitions, we analyze present bounds on SUSY parameters, discuss possible
deviations from SM predictions in Bd and Bs physics and present strategies to
reveal SUSY signals in present and future experiments in the CKM domain.Comment: Invited talks given by A. Masiero and L. Silvestrini at the Workshop
on the CKM Unitarity Triangle, IPPP Durham, April 2003 (eConf C0304052). 9
pages, 5 figure
