I only know of one cover-up operation, and that didn't include material directly about Eliezer or the SIAI.
Hey, maybe this was the point of that exercise -- a deliberately flawed cover-up, to make me underestimate how easily the SI can hide any facts they really want to keep secret!
I wouldn't exactly call it a cover-up. It looks to me like the actual goal was to ensure that a particular subject wouldn't develop further, by derailing any discussions about it into meta-discussions about censorship. Lots of noise was made, but no one ever published a sufficiently detailed description of the spell, so this did in fact succeed in averting a minor disaster.
I thought this may be of interest to the LW community. Jacob Barnett is a 12-year old male who taught himself all of high school math (algebra through calculus), has a currently scored math IQ of 170 (for what that's worth) and is currently on track to become a researcher of astrophysics. His current major news worthy claim-to-fame (aside from being really young): The Big Bang Theory is currently incorrect (I believe the article states he has something about a lack of carbon in the model), and he's planning to develop a new theory.
I haven't learned anything serious in physics, so I have nothing to note on his claim. I realize the news article cited puts him claim fairly generally, so I'll ask this: Can someone explain how elements are generally modeled to have formed from the big bang? And is there anything that it Jacob may be missing in the current literature?