Clojurians Log v2

Hmm... I'd like an om.next UI component to use a channel for its subcomponents to communicate. It sounds like the right way to do that is with om/computed when the subcomponents are rendered (though I could be wrong; it just seems cleaner than putting the channel in the global app state). But I can't work out how to use computed props in a devcard, which would be awfully nice for testing. Anyone used computed props and devcards?