Well now, this is interesting. I just got an email from "firstname.lastname@example.org" (which would be, I believe, Warner Brothers) about my choice of site name and of pseudonym. Nothing hostile, which I appreciated, but an inquiry about whether I cited the sources of the pseudonym and phrase. I replied that I did so (as you can see by that newly-added link at the top), and mentioned that I would be happy to add a proper bibliographic citation of Mr. Card's work, should it be required to distinguish my own humble site from his writings.
I anticitipate that clearly acknowledging the source of both should clearly resolve the issue, but will let you know if anything develops.