RealClearPolitics (RCP) already moved OH to the tossup category a week ago, although Obama has a statistically insignificant 2.6% edge in Ohio. In the past three days, they also moved the 52 electoral votes carried by WI, PA, NH, and MI to the tossup category. RCP has Romney with a slight but not statistically significant edge (0.7 to 1.5%) in the four that just moved.
Please disregard the Obama/Romney comparisons in individual states; the numbers I typed are garbage.