I completely agree with J. The reason people gain all their weight back is because they used Atkins like a crash diet not a change of eating habits. It's a way of eating not a "diet." I lost 50 lbs in 4 months and have kept it off for several months because I have continued with my high protein/low carb/whole food WOE (way of eating).
I found lowcarbfriends "bulletin board" (forum) to be super helpful. There are a lot of posters that have been doing low carb (Atkins, South Beach, HCG, etc.) for a long time and they are very helpful. I love their recipe section.