  We calculate the form factors for the heavy-to-light transitions
$B\rightarrow \pi,K $ by means of QCD sum rules using $\pi$ and $K$ light-cone
wave functions. Higher twist contributions as well as gluonic corrections are
taken into account. The sensitivity to the shape of the leading-twist wave
functions and effects of SU(3)-breaking are discussed. The results are compared
with quark model predictions and with the results from QCD sum rules for
three-point correlators.
