Hi
I just bought a 97 Sunfire 2 weeks ago and yesterday I had the same problem - my ETS and ABS lights came on and stayed on til I stopped the car and the same today. (Yes, it was wet out) You said you replaced a wheel speed sensor and though yours was covered by warranty I was wondering approx. how much it was. Just spent huge dollars trying to fix an intermittent problem on my last car so depending on the price, may just drive it with the lights on seeing the car and brakes still seem to be working fine.
Thanks alot