Politico's Jonathan Martin links to Barack Obama's interview with the Military Times. In the interview Obama said,

If current trends continue and we’re in a position where we continue to see reductions in violence and stabilizations and continue to see some improvements on the part of the Iraqi army and Iraqi police, then you know my hope would be that we could draw down in a deliberate fashion in consultation with the Iraqi government, at a pace that is determined in consultation with General Petraeus and the other commanders on the ground and it strikes me that that’s something we can begin relatively soon after inauguration. If on the other hand you’ve got a deteriorating situation for some reason then that’s going to have to be taken into account.

As Martin says, Obama's language is quite "unambiguous."