I just knew there must of been such a service offered by the Disney Resorts, but we had a different experience last year at the Polynesian. We had a split stay and when asked if they offered a service that could transfer our luggages to our next resort (Animal Kingdom), they (concierge and valet) both told us.. not really! They suggested us taking a taxi or the bus?! Since we didn't want to pay 30-40$ just to get to AK, we had no choice but to transport all of our luggages with us in the bus..

I'm not sure if the cast members just weren't aware of this service or the Polynesian itself doesnt offer it, but I just thought it didn't make sense and how absurd a Deluxe Resort couldn't offer such service!
Now, reading this post and knowing there IS actually such service, makes me upset that we even had to go through all that trouble transferring from one resort to another..