2003 Sway While Accelerating and Stopping

2003 Grand Am, 3.4L, 136,000 miles. While driving to work this morning my car felt like it was swaying towards the right. This was not a constant pull, but seemed to only happen while accelerating or braking. I did not drive it at all over the weekend, and the last time I did we had just received a lot of snow that I was driving through. I also just rotated the tires about 500 miles ago. Does anyone have any ideas on what this may be? I have not had a chance to look at it yet, but will tonight. Just wondering where I should start. Could this be a stuck caliper?

Was thier any wind that would have pushed you to the right ?

I'd check the tire pressure.
If you reversed the tire rotation direction you could have a busted belt in one of your tires causing it to sway.

Other then that look at your sway bar bushings and see if one on the right is broke.