Updated analysis of some two-body charmlessBdecays

New data from the BaBar, Belle, and CLEO Collaborations on B decays to two-body charmless final states are analyzed, with the following consequences. (1) The penguin amplitude which dominates the decay $B^{+}\to {\pi }^{+}{K}^{*0}$ has a magnitude similar to that dominating $B^{+}\to {\pi }^{+}{K}^0.$ (2) The decay $B^{+}\to {\pi }^{+}\eta ,$ a good candidate for observing direct $\mathrm{CP}$ violation, should be detectable at present levels of sensitivity. (3) The decays $B^{+}\to {\eta }^{\prime }{K}^{+}$ and $B^{+}\to \eta K^{*+}$ are sufficiently similar in rate to the corresponding decays $B^0\to {\eta }^{\prime }{K}^0$ and $B^0\to \eta K^{*0},$ respectively, that one cannot yet infer the need for “tree” amplitudes $t^{\prime }$ contributing to the $B^{+}$ but not the $B^0$ decays. Statistical requirements for observing this and other examples of tree-penguin interference are given. (4) Whereas the $B^{+}\to {\eta }^{\prime }{K}^{+}$ and $B^0\to {\eta }^{\prime }{K}^0$ rates cannot be accounted for by the penguin amplitude $p^{\prime }$ alone but require an additional flavor-singlet penguin contribution $s^{\prime },$ no such flavor-singlet penguin contribution is yet called for in the decays $B^{+}\to \eta K^{*+}$ or $B^0\to \eta K^{*0}.$ Predictions for the rates for $B^{+}\to {\eta }^{\prime }{K}^{*+}$ and $B^0\to {\eta }^{\prime }{K}^{*0}$ are given which would allow one to gauge the importance of these flavor-singlet penguin amplitudes.