Yes, in the Poly, outside Kona there is wine by the glass- I've had Caymus 40 by the glass there. There are other good wines there too.
Tutto Gusto is Epcot has a great wine list (and nice cheese and meats to accompany)
There is a nice wine list at the bar at The Wave Bar, awesome stuff available at the California Grill and Narcossee's (actually at Narcossee's a bottle of Caymus is $130- which is not a bad mark up at all!)