NBC will talk about a 3 point margin among likely voters, 49-46 (although they point out among registered voters it is 51-44, the margin having increased by 1 since the last iteration).
But that is asking only about Obama and Romney.
With Gary Johnson & Jill Stein on the ballot, tally becomes: Obama 48, Romney 43, Johnson 3, Stein 2.
That's a 5 point national margin. In 2008 the national margin was 7 point, and Obama won 365 electoral votes. At a 5 point margin, Obama is a cinch for over 300 electoral votes
Then there are the problems in the states. Note the new SUSA poll that has Obama up 8 among likely voters (Kaine up 10 over Allen in the Senate race), as compared to the 52.7-46.4 margin (6/7) in 2008. Even discounting the margin a bit, it does support other data that shows Virginia moving out of range for Romney. Consider just this: Lose OH & VA and there is no path to 270 for Romney.
The internals of the NBC poll, where people are on taxes, economy, who better understands them - there are real issues for Romney.
But simply remember this:
With Gary Johnson & Jill Stein on the ballot, tally becomes: Obama 48, Romney 43, Johnson 3, Stein 2.
It's a 5 point margin folks, not a 3 point margin.
UPDATE - there is some detail in the thread. For those interested in the crosstabs, which are fascinating, here's the link for the details of the poll