If trichet and Co. pull another increase, Fed will feel the pressure to follow suit. Increasing disparity between the 2 zones is fueling one currency and deflating another. The spread is adding to inflation pressures and if the spreads increase further it will only weaken USD further, thus adding more inflationary pressures.
Most of the rate cuts were in response to the credit crisis worries. Now that it appears that worry has subsided, the Fed can take back some of the cuts.
Emergency rate increase? No such thing. But look for rates around 2.5 by year end.