  The model of RH neutrino fields coupled to the MSSM is shown to yield a large
parameter regime of warm inflation. In the strong dissipative regime, it is
shown that inflation, driven by a single sneutrino field, occurs with {\it all
field amplitudes below the Planck scale}. Analysis is also made of
leptogenesis, neutrino mass generation and gravitino constraints. A new warm
inflation scenario is purposed in which one scalar field drives a period of
warm inflation and a second field drives a subsequent phase of reheating. Such
a model is able to reduce the final temperature after inflation, thus helping
to mitigate gravitino constraints.
