An Attractive Proposition -

Interesting,.. very interesting that you
should raise this issue. The *effect* of
gravitation still does travel at the speed
of light, and the gravitic charge is still
instantaneous. So both GR and Newton
are in alliance on this issue, well, sort of.

You might wanta clarify a bit, Paine. What you're terming the "effect of
gravitation" would be those yet-undetected distrubances propagating at
c, ie., "gravitational waves".
GR's belief that gravity itself propagates at c is
just plain wrong, as stated previously. Whereas 'speed of charge' is
indeed instantaneous. The Fomalont-Kopeikin experiment purporting to
'prove' gravity propagates at c was in reality just a roundabout way of
measuring the speed of light.