Hi Dustinwas
We are also staying at All Stars, and I think the cheapest option for getting to the airport is by Mears. Have a look at their website, it is not too expensive, although you may have to wait while other people are dropped off first. If there are only 1 or 2 in your party this is probably the cheapest.
If there are more, you may want to consider a towncar service such as YouRide or Tiffany Towncars. These are definately more expensive, but you can travel in style and I think YouRide do a grocery stop if you want to get some supplies in before you get to Disney.
Hope this helps, Have a great holiday
Maria