  We present results on the NLO (alpha_s^2) spectator-scattering corrections to
the topological penguin amplitudes for charmless hadronic two-body B-decays in
QCD factorization. The corrections can be sizable for the colour-suppressed
electroweak penguin amplitudes alpha_{4,EW}^p but otherwise are numerically
small. Our results explicitly demonstrate factorization at this order. To
assess the phenomenological viability of the framework, we consider
penguin-to-tree ratios in the penguin-dominated pi K system and find agreement
to the expected precision (i.e., a power correction).
