I think wellbutrin is helping me. I quit drinking before I started wellbutrin and really haven't had much trouble with urges but there have been none since I have been at a reasonable dose of wellbutrin. Also I have been losing weight partly die to appetite suppression and partly due to not having binged on anything or even had the urge to. I did want to lose weight also. A substantial portion of my extra weight came from binges; I mostly eat decent meals. I have heard that wellbutrin helps smokers quit also; someone in the BP forum mentioned not wanting to take it because she wasn't ready to quit smoking yet.
I agree that having medicine that seems to help or cure addictive behavior makes a pretty good case for it being an illness.