If NV is a lost cause as some have suggested, then IA(6), NH(4), and ME(1) leaves Romney one EV short of a tie (270-268). Romney really needs one of OH or WI to make it work without NV.
Either that or PA. From what I understand the only thing that might have changed in NV is a higher Hispanic population since Bush won it both times.
NV has also voted with the winner of the presidential election every time since 1980. I’m not sure why it would be written off now.