I too am one of those returning to Atkins after having lost all my weight 4 or 5 years ago. It has been unbelievably hard. I basically didn't loose anything over a 7 week period without cheating! The last 4 days I've been doing the Atkins fat fast( you can get the details on the Atkins site). I am loosing 1 lb or so per day so it really has perked me up! Not sure if you are ready to go that route or not but just thought I'd give my two cents worth. It really has been a lift for me. There is also a very lengthy thread....frustrated......now fat fast......There might be some info there also.
Good luck and this is the WOL!