Actually, I'd love to know the answer to this myself. We stayed there once before last year (our first trip home) and were a bit dissappointed with the lack of variety with regards to onsite food. There is the Artist's Pallette, and I think that's about it... I don't know if there is any sort of room service from there - pizza delivery, etc. - I ended up just sending my husband up to the main building to pick something up at the Artist's Pallette, which to be honest, I wasn't all that thrilled with. My husband and I ordered the two "special" hot meals one night, and were both sick that evening. Of course, who knows if it was that or something else we ate that day, but just gave me a bad feeling about the place.
My thinking was also that they really want you to go to Downtown Disney, which is close, but not always convenient - especially with small children. I'm hoping they do consider adding, at least a delivery service from the main house to make it more convenient. Even better would be if someone came up with a delivery service for the Restaurants at Downtown Disney. Ahh....Now that would be a good business....