I’m still looking at it myself, but I think it’ll take a little work to get a good implementation for ember. I’d like to see an ember-cli addon that uses liquidfire instead of their motion ui, obviously components for everything, and services for model managers and such.
There is also other interest so I’m sure we’ll see something down the road. Personally, I’m waiting for foundation apps 1.0 stuff to shake out, see what Bootstrap 4 offers, and ember 2.0 featuresets to come out before maybe working on an addon myself.
At this point, I think the best option to use Foundation for Apps within an ember-cli project would be to install via bower (manual install section) and use the sass addon (since css isn’t distributed). Although I haven’t done anything myself just yet.