I gained about 80 lbs with my twins, and although I don't know how much I lost from the birth, by the time they were 3 months old I was 10 lbs BELOW my pre-pregnancy weight (and still eating a pint of ice cream every day). I had to go and buy new pants at 8 weeks b/c all of my pre-pregnancy clothes just hung on me. I could eat ridiculous amounts of food during the first six months I was nursing and still lose weight. Then the demand tapered off I guess.
I never had the sweats post-partum (which is common), but I did pee like a race horse for weeks. It was ridiculous.
I still have extra belly skin; I suppose surgery is the only answer to that, but mine are now 6 years old and the extra skin problem did continue to improve for at least two years after they were born.
I developed a HUGE diastis (separation of your stomach muscles) that my doc said only surgery could fixt, but that has also healed for the most part with the help of yoga (and I didn't have the energy to start exercising till they were almost 3 yo). Just make sure you find someone to help you with the stomach thing that knows what they're doing . . . regular sit ups and crunches will make it worse.
Basically, your body will never be the same again, but you probably won't care