So I got my tires rotated and balanced and now the steering wheel seems to shake slightly when I get above 60mph? It was absolutely fine before the rotation/balance. What happened? Should I get the tires re-balanced or just get an alignment.

 

Rebalance the front tires and you should be fine.

I always balance the set that goes on the front of my car, every time I rotate them. It assures a nice smooth ride all the time.

 

Pulling to one side or the otheris usually alignment. Vibration is usually balance. Good balance should take care of it, like was said above.