Personally, I am doing as Susan suggested and not using personally identifying information. There'll probably soon be enough little things on here that someone who knew me, and who sifted through my posts, could work out a suspicion that it's me. But the odds of that happening are pretty well zero.
I'm not planning on posting any photos, certainly none showing my face, at least until I'm out to the public without caveat. Even without names or identifying details, there *are* image searches out there that could conceivably find you. I don't think the risk is high, and I'm personally not particularly worried about what would happen if I were to be outed before I intend, but I don't see enough reason to post such pictures. The benefit (to me) is very small, so any risk tilts the risk-benefit analysis.
But then, I'm also pretty cautious about posting things to the Internet in general.