Hootiekay,
I started out on WW and lost 21 lbs. and then switched to South Beach when I hit a plateau. All the weight I lost with SB came back...and fast. I just renewed my WW online account and I'm starting again fresh on Monday. I'm going to stick through it this time, even if I hit a plateau again. Have you ever tried the Walk Away The Pounds dvds. They are a great workout if you like to walk, which it sounds like you do.
I feel your frustrations and all the other feelings with this. Stick to it and make little changes everyday and that weight will come off. I used to be in a thread on this site that would do daily challenges like 20 min. walks, drinking 100 oz. of water, eating 3 servings of fruit/vegetables. Kind of a neat little way to keep on track.
BTW, I'm Chris. I'm 34 and a stay at home mom with rheumatoid arthritis. I know..seems kind of young for those problems already but it's an auto-immune disease that attacks the joints. Bless my mom for her genes...

She has it too...maybe...We'll find out her test results on the 21st.
You can find me mostly on the Mom's Losing Weight thread or on Friends with RA & OA. If ya want to find me...just click on my name and scroll down to: Find more posts, etc.
TTFN, and I'll check back tomorrow to see if you got a chance to read this. Welcome...I'll be looking forward to more posts from you.
~chris