  It has previously been shown that a measurement of Arg$(V_{ub})=\gamma$ can
be obtained from a triangle construction using ${\cal B}(B^0\to K^+\pi^-)$,
${\cal B}(\bar{B^0}\to K^-\pi^+)$, ${\cal B}(B^\pm\to K^0_s\pi^\pm)$, and
${\cal B}(B^\pm\to \pi^\pm\pi^0)$. We evaluate experimental as well as
theoretical uncertainties in this measurement. We find that a measurement of
$\gamma $ with the next generation of B-factories (BaBar, BELLE, CLEO III) is
statistics rather than theory limited if soft rescattering effects are small.
