Looking for new probes of dark matter annihilation in the CMB sky.

Measurements of CMB anisotropies place strong bounds on the properties of thermal freeze-out WIMP dark matter. These bounds are expected to tighten considerably, or possibly provide a positive signal, with upcoming Planck measurements. I will describe work in progress to calculate a novel effect, the possible imprint of dark matter annihilation in CMB non-gaussianity.