After my first procedure (I was the doctor's first) I was on Plavix for 3 months. He had no good rationale for this, but a "better safe than sorry" kind of call. Subsequent patients got anything from baby aspirin, to 325mg aspirin, to Plavix. He did not use any stents.
The doctor who did my second procedure puts balloon-only patients on 325mg/day aspirin for 3 months, and stented patients on Plavix for 3 months.
I have no stents.
Hope that helps!