OTB, I'm so sorry to hear about your dad. I hope he wasn't in much pain and that he rests in peace.
Incidentally, I too was just reading up about Leptin after being intrigued by Anand's post and was going to start a Leptin 101 thread. I'm on a 3-week no-fruit, no-sweetener-of-any-kind, no-starch fast (like South Beach's first phase but with higher amount of fat)since the beginning of the year and I've lost 2 lbs - a first for me since I became Primal. I'm also trying to cut out eatertainment as that used to be (still is?) my biggest problem. And because I've told myself that I can't eat certain things, I don't feel tempted when I look at fruit and dark chocolate. I wonder how the absence of these foods is affecting my leptin sensitivity.