It is a popular vote tie as of today. (Rasmussen gives it Romney +4, but I think that was from Romney's RNC convention bounce.)
The EC is not tied, however. Something like this, I suppose:
Obama 287
Romney 251
Florida is tricky. If it swings--and it might--then it would be Romney 280.
I should add that I'm not really certain how Iowa, Virginia, New Hampshire, or Ohio would vote today, if the election were held today. I gave VA and NH and OH the benefit of the Romney bounce. IA people are square, so their votes will be less affected by short-term bounces. That is why I discounted the bounce there. But in all those states, and Florida, it could go either way. I expect lots of money to be spent in those five.