I've been there... 3 times. I know you are exhausted and feeling like you'll never get good sleep again. This is what I have done.
1. Try cutting out one nursing overnight at a time. I start with the first one (usually my kids would wake around 11:30 or midnight). Try to send your husband in and have him soothe baby.
2. She will probably start sleeping through that first feeding after a week or so (yes it could take 6 or 7 nights). Then start with the next feeding and proceed.
3. At this point she knows that if she keeps crying you'll give in, so sending in your husband is a great way to change her tune. When my husband would go in my babies would see him, and just lay back down after a few weeks of working on it (yes a few weeks!).
I liked the "No Cry Sleep Solution" books by Elizabeth Pantley (sp?). She has one for babies and one for toddlers.
Keep offering a sippy, but maybe try just water at meal times. Is she eating 3 meals a day? By 10 months, she could be eating table foods and using a regular cup too - my kids were on regular cups (not sippy cups) by around 10 or 11 months. I don't like cleaning the sippies so I never use them unless we are out of the house.
Another thing to remember - she will only be a baby once. Once you reach 17 or 18 months, 10 months feels like a long time ago. My kids are 5, 3, and 18 months. I nursed them each to around 16/17 months and they all were sleeping champs by around 18 months.
It feels like a long time ago that I was up nursing in the middle of the night, and really it's only been a few months.
It goes so fast, try not to worry about it, embrace the time with you daughter and know that in a few years you'll miss it.
best of luck
J.