At what point does a speeding object become a singularity?

No. It will not attain singularity status unless it reached the speed of light. Since it can not attain the speed, it can not happen.

E = mC*2 doesnt say that mass is energy. It says that there is an energy equivalent to mass if the mass were compleletly converted to energy. Also, the equation you wrote only pertains to rest mass (Not accleration/moving). There is another term which takes into account the mass that actually increases (intertial mass) with velocity.

"Since energy = mass it would imply that mass would exert a higher gravitational pull."

Incorrect, and this is why the entire language of "relativistic mass" should be discarded. The modern terminology is that E = mc^2 is true only at rest, and the "mass" is what used to be called the rest mass. The gravitational mass does not depend on speed.

Here's more on the subject.

http://www.corepower.com:8080/~relfaq/black_fast.h...

You are just a little harassed. First of all, the wavelength of the electro-magnetic radiation does not impact the behaviour with regards to black holes. Radio and gamma photons are each trapped within the identical method. Second, the small dense mass turns into a black gap on the factor in which it turns into a singularity. So any singularity traps photons.