some abstracts re gravitons, from Scirus:
Local Photon and Graviton Mass and its Consequences
Authors: M. Tajmar, C.J. de Matos
http://arxiv.org/abs/gr-qc/0603032
Graviton emission from a higher-dimensional black hole
Authors: A. S. Cornell, Wade Naylor, Misao Sasaki
http://arxiv.org/abs/hep-th/0510009
Gravitomagnetic London Moment and the Graviton Mass inside a Superconductor
Authors: Clovis Jacinto de Matos, Martin Tajmar
http://arxiv.org/abs/cond-mat/0602591
The second paper is too much to read. I'm sure it does not contradict what I said about spacial curvature. Physically, there is no difference in the effects.
The third paper is not applicable to the space of the solar system. It regard the mass of a complex object(the Cooper pair in the Nb superconductor), not the mass of any free photons, or gravitons.
