Possible Duplicate: When is it correct to use “yourself” and “myself” (versus “you” and “me”)? According to Google Ngram, "I am myself" is more common that "I am I", but which is correct? ...
Possible Duplicate: “It is they who lied” or “it is them who lied?” What rules make “Remember me, who am your friend” grammatical? Which one of these is correct? It is I who am at ...
I'm fairly sure it's the former, but it sounds even more stilted than the usual cases in which "I" is less common, but more correct.