  We consider a two-field model for inflation where the second order metric
perturbations can be amplified by a parametric resonance during preheating. We
demonstrate that there can arise a considerable enhancement of non-Gaussianity
sourced by the local terms generated through the coupled perturbations. We
argue that the non-Gaussianity parameter could be as large as f_{NL} ~ 50. Our
results may provide a useful test of preheating in future CMB experiments.
