I just got contacted by this person in the same way as 23skidoo (via my Wikipedia page, as a listed member of the Doctor Who WikiProject there). At least, I'm 99% sure that it's the faker. But what a bizarre person to choose to impersonate! I suppose the logic is that if you choose someone sufficiently obscure, it'll be more difficult for people to find you out... but I'd heard something vague about this hoax before, so she'll have to either move on to the next target, or perhaps choose a new person to pretend to be.
By the way, 23skidoo, did you ever contact the real Miranda Borman about this?