She really is elusive, which just increases the mystique even more. If she were running around in public we would just assume she is one of the 15, the fact that she has cut herself off from the media and shut down her website makes me think she is part of the F2. Either she is recovering from a broken heart or logging in time talking/being with Jason.
It would not surprise me if half of the girls on the show went on it with a crush on Jeremy, the fact that any of them might make it to the final 4 would lead me to think that being cut might be more difficult for them then if the Bachelor was completely unknown to start with. Whomever is F2, F3, F4 - my heart goes out to each of them.