Depending on where you live, you may be able to book online through AAA - it depends if your state has their travel booking engine online. Go to www.aaa.com and enter in your zip code. It will redirect you to your state AAA website. Look for a button or link to Travel and click on it. You should be able to book it from there.
I use AAA Colorado and I can book a Disney room-only online (or just check availability of AAA rates ) but not a package. There's a "request quote" form for packages.
Thanks, I was looking for a place on Disney's site to enter a code or a link of some sort. I had problems in the past booking my trips with a TA. I like to do everything myself directly with Disney. Calling Disney all the time can be a hassel.