The biggest problem with the disney kennels is they offer little above a crate to store your dog. You have to come 2-3 times during the day to walk etc. It just not very convienent.
There are some really good looking pet "resorts" in the Orlando area. The one looks especially cute: Miss Emily's Bed and Biscuit:
http://www.missemily.net/ however, a google search of "pet boarding orlando" pops up a lot of options!
ETA: I copied this from the disney web site:
With the exception of service dogs for Guests with disabilities, pets are not permitted in the Theme Parks or hotels, or on the Resort or Theme Park buses. They may, however, stay in one of the air-conditioned kennels, which are members of the American Boarding Kennel Association.
Pet Care Kennels are located adjacent to the Park entrances at Epcot®, Disney-MGM Studios and Disney's Animal Kingdom® Theme Park. At the Magic Kingdom® Park the Pet Care Kennels are located adjacent to the Transportation and Ticket Center.
Kennel fees are $6 per day and/or $9 per night per animal for Walt Disney World® Resort Guests ($6 per day or $11 per night for non-Walt Disney World Resort Guests). Guests will be required to visit their pets at least once daily. Dog owners will need to walk their dogs at least twice daily (three times daily for puppies). The kennel at Epcot® offers a dog walking service for $2.50 per walk.
Resort reservations do not guarantee a kennel space for your pets; you should call for availability. Though the kennels have been designed for pets such as dogs and cats, they also accept birds, ferrets, small rodents and non-venomous snakes, if in their own carriers. The kennels are not set up to accommodate exotic animals. All Guests are required to show records of vaccination (rabies, parvo, DHLP, Bordetella for dogs; rabies, FPRC for cats) prior to boarding.
The plus is it's very inexpensive, but your dog is stuck in a cage until you come and let it out. I wouldn't like to a) worry that my poor pup needed to pee and no one was there to let it out b) have to get out of line to rush over to epcot to let him out myself.
I'd feel much better with hime in a full service boarding facility
Good luck