That's Hillary Clinton speaking just a few moments ago in New York.
She will be talking to supporters and party leaders over the next several days to see what course of action is in the best interest of the party and the best interest of the nation. She's not dropping out. Though she seemed to understand the state of things.
I would recommend that Obama and his supporters, who must be frustrated that Clinton is not leaving the race and giving Obama his moment in the sun, be magnanimous in victory. Clinton will be out soon enough; treating her with grace and respect now will probably go a long way in determining how her supporters feel about his candidacy.
Update: I suspect Clinton will wait to meet one-on-one with Obama before making her decision. Tim Russert is insisting that a close Clinton confidante that he trusts is telling him Clinton wants the vice presidency. She will probably see if Obama plans on offering it to her before she decides what she does next.
If she drops out, she loses leverage.