I've read that Vaccinium ovatum can make a nice hedge when clipped, which got me thinking about trying a hedge of Vaccinium moupinense. Does anyone have experience with this?
But it has a more open, airy form. Moupinense is more compact. I am looking for a sort of boxwood replacement, but with edible fruit.
You could try ugni molinae (Chilean Guava). Evergreen, tasty fruit, and often clipped to hedge form. It'll depend on your site, as hardiness could be an issue, though mine are growing well in the ground and have survived a couple of (relatively mild) winters. Probably a special order item through local nurseries; I had to import mine from the states.