Ray,
I believe that you are quite mistaken: the gravitomagnetic field *has* been observed.
Two days after I submitted my essay I received the 3 Dec 2010 issue of Physical Review Letters 105, 231103 ("...on Non-Newtonian Gravity") which describes a 13 year study of LAGEOS satellite(s) that tracked the relativistic precession with one centimeter rms accuracy ("the most accurate measurement for the pericenter advance of a satellite orbiting the Earth ever made.") The results differ from general relativity's predictions by up to 0.2% and the difference is attributed to the C-field, or gravito-magnetic field.
Darth Sidious then scolded me for saying that the gravito-magnetic field is not well known: "I regret, but you makes confusion on this point. Actually, gravito-magnetic effects are well known within General Relativity, i.e. the C-field...is indeed a part of General Relativity, see for example the recent review published in Astrophys. Space Sci. 331:351-395, 2011."
Probably the best detection of the C-field is the experiment performed by Martin Tajmar, with, I believe some confirmation from experiments in Japan and New Zealand. A good paper is one where he notes the results 10**31 orders of magnitude higher than expeced:
Martin Tajmar, et al, http://lanl.arxiv.org/ftp/gr-qc/papers/0603/0603033.pdf 'Experimental Detection of the Gravitomagnetic London Moment'.
So Ray, I don't think it is accurate to say that the C-field hasn't been observed. It's been observed on earth, and in space, and is implicated in the 'flyby' anomalies, (see Grumiller, 'Model for Gravity at Large Distances', PRL 105, 211303, 19 Nov 2010.) Grumiller provides numbers needed for quantitative analysis and he reports the scale of observed anomalous accelerations which are compatible with my calculations.
And there is, for most of us, little doubt that the "gravito-magnetic charges" exist. The gravito-magnetic charge is simple 'mass' (which I believe exists whether or not a Higgs is found) and the analogy to "charge current, qv" is simply "mass current, mv", also known as momentum.
Ray, I invite you to read my essay again. I think you've missed something. I do read yours several times, and each time have been impressed with your treatment of the 'golden ratio'. As you know, complex things cannot be digested in one reading.
I hope you look at some of the above references (I have many more) if you are still not convinced. I was surprised by your statement that mass (the gravitomagnetic 'charge') does not exist.
The fact that I am the only person who has applied the Yang-Mills non-linearity of the C-field to particle physics has nothing to do with the existence of the field. It has more to do with habits of thinking that are based in linearity and the (always surprising) effects that derive from non-linear interactions.
Edwin Eugene Klingman