Ha! Just had the reverse problem at the Gaylord Palms a couple of weeks ago. We were actually staying at Beach Club, but were down there for our daughters' dance competition, which was at the Gaylord, so we spent some serious quality time there during the week. All they had was Pepsi products, which nearly drove me crazy, so I can feel your pain (in reverse, I guess)...although having Mountain Dew accessible was a nice treat for our girls (at least in their minds!). As far as I can tell, you'll only find Coke products on WDW property.