Actually it's just been superseded by it's even more popular offspring the "South Beach Diet".
I did Atkins and lost nearly 40 lbs 3 years ago, but over the last year I've put almost half of that back on and was having a hard time getting started back on the Atkins diet.
So recently my wife got me and our oldest daughter to join her in trying the South Beach Diet. I was on it for a week and was absolutely miserable. I was hungry ALL the time.
I guess what I like about Atkins is being able to eat as much as you want of the zero-carb foods. When I first went on it, after about 2 days my appetite went WAY down and I didn't feel like snacking. On the South Beach Diet that never happened and it seemed like that glass of tomato juice in the morning stimulated my hunger more than anything could have.