  The decay Bs -> mu+mu- is very sensitive to contributions from new physics
processes. Thus the Tevatron and LHC experiments are hunting for an observation
of a Bs -> mu+mu- signal. In this article the updated search for Bs -> mu+mu-
and B0 -> mu+mu- by the CDF experiment is presented. The CDF result was
received with great interest because an excess over the background expectation
is seen, although of modest statistical significance and still consistent with
the prediction of a standard model signal and other experimental results.
