Neoomk--meant to also say, Welcome to the DIS!!
I haven't seen many hotels with indoor pools in FL. There is one resort that I cannot remember it's name and the whole courtyard, pools, gardens area is indoors, but while I can't remember the name, I do remember that it is really pricey--I am thinking it is Gaylord Palms.
You have picked a great time of year to go. We were considering going again next Dec after our Feb trip in 2006 and buying annual passes, but now we are thinking of a trip to CA to visit family instead. Anyway, we went in Dec a few years ago and it is really great then with the decorations and crowds not being too heavy. (Though they were heavier than we expected.)