[Imladris]

Just one last thought...

I think that I remember somebody mentioning that in the movie TTT, they thought it was highly unlikely that Frodo would sort of just go up to the Nazgul and "give" him the Ring. Maybe that scene was was alluding to the Chapter VIII in Two Towers (The Stairs of Cirith Ungol) when Frodo, Sam, and Gollum were passing by the domains of the Wraith-lord and Frodo felt the almost irristable urging of the Ring...that would have been rather hard to portray on film.