2001 Oldsmobile Aurora

Steering problem
2001 Oldsmobile Aurora V8 Front Wheel Drive Automatic 64000 miles

I just got an alignment done after changing the wheel hub bearings on both sides. It still pulls to the right. What else could the problem be? I just put 2 new tires in the front because of the akward tread wear, and dont want to have this problem again. I would like to be as informed as possible before taking the car back to the place I had the alignment done.
March 8, 2010.

Could be the the brake calipers hanging up slightly, and ball joints, or even just a wrong adjustment of the tie rod ends

Mar 18, 2010.