I am going to have to agree with MrChad on this and say it sounds more like a U joint going out than a wheel bearing.

The Ujoint is easy to check just jack your car up in the air and put it in first gear or revers then manually turn the wheel back and forth in the driving direction and if there is unneccesary play then most likely you have a bad U joint....usually if its bad you can hear it click hard against the yokes.