I have to say that I just went to TDS to buy one of the cards to put $800 on to pay for the dining plan and the girl at the register said to me that these cards are not compatible with resort computers. It can be used basically everywhere else but not at the resorts.
Now I don't know if this is true or not, but I ended up not getting the card, just on the mere chance that it won't work.
I would love to hear if anyone has used the card to pay for accomodations or the dining plan at a resort.