  Electro-weak penguin and leptonic decays provide an indirect probe for
physics beyond the Standard Model and contribute to the determination of
Standard Model parameters. Copious quantities of B mesons produced at the
B-Factories permit precision measurements of the electro-weak penguin decays
and searches for leptonic decays. We review the current experimental status of
b -> s(d) gamma, B^0 -> D^{*0} gamma, b -> s l^+ l^- and finally B->tau nu
decays at BaBar.
