J.,
First of all, congratulations on your decision to meet your child's nursing needs for such a long time. That is rare in today's world, as I'm sure you know.
There is a terrific group of ladies that meet as the Toddler/Tandem La Leche League group in Clintonville once a month on a Thursday. They will have great tips for you--tips on how to convey to your hubby that she is not too old to nurse and tips on how to wean gently. If you are interested, PM me and I will give you more info.
My son is also 27 months. We night-weaned him around 17 months, but he still nurses in the morning, during the day and at bedtime. One thing the toddler nursing group will tell you is that it is OK to set limits on nursing toddlers. You don't have to nurse-on-demand like you would an infant. Your 2 yo has much more capability to understand that you have needs too--like sleep for instance--than when she was an infant and you were her entire world. That is not to say that she won't be terribly upset (in the form of crying) about your needs.
When we night-weaned my daughter (who is 4 now and still nurses for "two songs" when I put her to bed), I was pregnant and my nipples were so sensitive I just couldn't stnad it during the night. I slept in another room and my husband did the nighttime parenting for about 3-4 days. She was comforted by him when she was upset about not having "nursies". She was not alone crying it out. She would go to bed in her own bed, but would come into our bed when she woke up. After the initial days, we used a nightlight on a timer to signal when she could nurse in the morning. This process took many months, mostly because I wasn't consistant and I would "give-in" and sometimes nurse her because she was so upset.
When we night-weaned my son, we did a similar process, but it worked better because I was more consistant and he has a more easy-going personality. He still wakes at 5 or 5:30 and wants to nurse. Following a 2 week vacation where I relaxed the rules, we're paying for it now. We're now working on being quiet when he comes into our bed. He doesn't cry so much, but he talks and is picky about where his water is placed on the nightstand, etc. It's hilarious, but at the same time, it is ruining our morning sleep.
I wish I had more hope for a smooth transition, but two year olds know what they want and when they want it; and they don't know how to be patient yet.
Hope this helps--feel free to PM me. There are way too many experiences with this then I have time to put in this post. :)
Laura