I've had pretty good luck with karma
My exboyfriend had a serious case of bad karma not too long ago
See, when we had dated (2 years) he had cheated on me over 4 times, and was quite proud about it and even bragged about how I would never get over him and all that crap.
Well, 2 weeks after we broke up I hooked up w/TKE209, been together ever since. (+2 years). But here's the juicy part, a month or two ago he informed me that his fiance (now EX, Ha!) went off and had been cheating on HIM! He actually thought I was going to feel sorry for him!
New thing, he informed me a few days ago that he had changed and he wanted to start stuff again *oye*. I informed him and TKE209 and I were now shopping for rings, that was one hellava "ouch" from him...muhahahahaha