Top Quark Mass Measurement from dilepton events at CDF

We present unique measurements of the top quark mass
in the top dilepton channel from proton-antiproton collisions
at the Tevatron using the CDF II detector. This channel is
relatively clean and has less dependence on the jet energy scale,
yet is quite difficult to reconstruct due to the two neutrinos in
the final state, which create an under-constrained final state. Yet
statistically limited measurements due to the small dilepton
branching ratio are no longer a problem with the large 1 fb$^{-1}$
dataset. Top mass measurements using two different methods
will be presented: a precision matrix elements method, and
template methods which use the neutrino pseudo-rapidity and
azimuthal angle. Comparison with lepton+jet and all hadronic
channels will be presented.