  The angular power spectrum of the cosmic infrared background (CIB) is a
sensitive probe of the local primordial bispectrum. CIB measurements are
integrated over a large volume so that the scale dependent bias from the
primordial non-Gaussianity leaves a strong signal in the CIB power spectrum.
Although galactic dust dominates over the non-Gaussian CIB signal, it is
possible to mitigate the dust contamination with enough frequency channels,
especially if high frequencies such as the Planck 857 GHz channel are
available. We show that, in this case, measurements of the cosmic microwave
background from future space missions should be able to probe the local
bispectrum shape down to an amplitude |f_nl| < 1.

Cosmology and Nongalactic Astrophysics