hehee - I'm up about 30-40 lbs., so the skin is filled out pretty well right now! Some people say their problems go away after several years, some need surgery to correct. It's different for everyone.
I have lost 88lbs and don't have any excess skin problems so far. To lose weight I have just been eating with more wisdom and less volume. I trrrryyyy to exercise and on average (over the course of a year) I probably exercise for 45 min a week. But I am trying to increase that (some weeks I am gung-ho and others I am just too lazy to do anything...).
I've only just started my weight loss journey so I don't know about the excessive skin, but I do have PCOS. I was diagnosed last summer. There is a PCOS/Insulin Resistance forum under dieting with obstacles that has some helpful info and can be a good place to vent frustrations - it doesnt' seem terribly active to me, though.