Gallup: 52% approve, 41% disapprove (older numbers broken down by demographic)
Rasmussen: Rasmussen generates two sets of numbers - a general approval number, like Gallup, and a passion index, which is (% who strongly approve - % who strongly disapprove)
General numbers: 48% approve, 51% disapprove
Passion index: -12
Rasmussen also has some other numbers that are rather interesting, also.
The much-touted 'beer summit' is coming up inside the next couple of hours. If I was watching these trends, I'd be hitting the bottle too.