I've got one album in my FB called "Weight Loss Progress," which I keep a handful of weight-loss related photos in. I enjoy sharing mainly because most of my friends are long-distance and already know that I've always struggled with my weight anyway. I don't mind letting everyone know that I'm working hard and have been able to show some progress, because it really is a part of my life and who I am. I keep it minimal and have gotten nothing but positive responses over it.
I don't go crazy posting the calories of every meal I eat, or brag about how many calories I've burned for the day, lol. To be honest, it annoys me when others do that outside of a setting such as 3FC, TOPS meetings, or other places set up specifically for health issues and weight management discussion, and I imagine it would be annoying to my friends if I filled their walls with every little detail of my weight loss efforts.
The way I see it, there's a time and place for everything.