  We describe a general scenario where primordial non-Gaussian curvature
perturbations are generated in models with extra scalar fields. The extra
scalars communicate to the inflaton sector mainly through the tachyonic
(waterfall) field condensing at the end of hybrid inflation. These models can
yield significant non-Gaussianity of the local shape, and both signs of the
bispectrum can be obtained. These models have cosmic strings and a nearly flat
power spectrum, which together have been recently shown to be a good fit to
WMAP data. We illustrate with a model of inflation inspired from intersecting
brane models.
