The NC polls show a tightening of the race. That is clear. But let's look at the polls more closely.
Both of the recent polls (PPP and SUSA) show an enormous lead for Barack among early voters. PPP shows a 63% to 31% advantage and SUSA shows a 57% to 39% advantage. If we average the two polls we have an advantage of 60% to 35% among early voters for Barack Obama. PPP states that the early voters make up 14% of the sample. Survey USA contends that early voters make up 2% of their sample, which doesn't quite make sense because while they were doing their poll, at least 120,000 had already voted in the Democratic primary. I would hazard a guess that PPP is more correct on this point.
Thus, instead of panicking, it is important to realize that Obama has a huge lead among early voters in North Carolina and has plenty of time to bring those voters who haven't yet voted back to his side of the fence.
UPDATE: There has been a huge surge in early voting in North Carolina in the past 24 hours - before Governor Easley's endorsement of Senator Clinton. The amount of early votes for the primary (both Republican and Democratic, but let's face it: Democratic) jumped by about 50,000 votes. This coincides with an enormous "early-voting rally" that Obama just held in Chapel Hill where the crowd was 18,000 strong. I hope that correlation means something.