From

http://pdg.lbl.gov/2009/tables/rpp2009-sum-gauge-higgs-bosons.pdf @ the Particle Data group

Mass m < 1×10

^{-18} eV

Charge q < 1×10

^{-35} e

Mean life τ = Stable

I've been saying that they are not massless and now their is at least an upper bound on the possible mass.

The same has be found to apply to Gluons as well it m <20 MeV

I have a educated wild as guess that should the graviton g and the Higgs Boson H

^{0} be found they to will have a non-zero mass with Higgs having the smallest.