The American hostages aren’t on the agenda:

Q Will there be talk about the four Iranian American scholars and activists that are being held? MR. SNOW: No. The conversations are restricted to security matters within Iraq proper. That is the channel that has been opened up. This is not a way of broadening diplomatic contacts between the nations. Q And about the five Iranians being held inside Iraq? MR. SNOW: Well, again, what we’re talking about are those who have been trying to destabilize Iraq. That is going to be a topic of conversation.