Hmm. This may be off topic, but like rwm it just occurred to me -- does anyone know if there's a commonly accepted title for addressing a genderqueer person? I don't know of any genderqueer agents, but there are several genderqueer authors and editors I follow on Twitter. (eta: I found a list here but I don't know which if any tend to be favored.)
My preferred neutral title (as in the one I'd like people to use for me) is Mx. Which is common enough that a non-binary person is likely to recognise it, though how they'd react to it if it isn't their preferred title... don't ask me. I don't use titles unless an agent's guidelines list a title. I use whatever name they use on their guidelines, with or without title as stated.
That said, I'm not aware of any non-binary gendered agents, let alone ones who specifically identify as androgynes. Which would make sticking to my own gender a little sad at querying time.