Haven't tried with an iPad mini, but any normal USB hub going into the Camera Connection Kit works fine with a full-sized iPad. Plug QuNeo and QuNexus into the hub and you're good to go.
You will more than likely want it to be a powered hub. The iPad is capable of powering both at the same time (if QuNeo is in iPad mode), but there is still a limit to how many LEDs can be on before drawing too much power from the iPad (at which point the port will shut down).
We tried it out here and it works great with a powered hub. Still works when the hub isn't powered, but has some LED limits. I'm not entirely sure if there's a difference in available USB power between the iPad and iPad mini, though.
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