Yes, there are loads of places where you can get iced coffee! Most of the free-standing coffee stands serve it.

The ones I've been to are:
In Epcot, any of the Joffrey's ones have it; one is between Future World and Mexico (the pavilion, not the country

) and another is next to the American pavilion. IIRC, the cart outside of the UK pavilion also serves it.
In DHS, there's a cart outside of the T of T exit, and a cart to the right of the park entrance.
In AK, I don't remember where the carts are located, and the same for MK, but a CM can tell you.
Many CS places will make iced coffee.
HOWEVER..............if the place is still serving
Nestle's brand, don't even bother....unlike Joffrey's, it's horrid, both hot and cold

. BUT..........if they offer iced
cappucino (unsweetened) that's usually quite good (they can't use Nestle's for it

).