Mockups are interactive and can be shared similar to proto.io or invisionapp.com.
It would be great if mockups in Aha! could be interactive (clickable) and shared.
this would be a real differentor, marvelapp is another tool that comes to mind with this capability
This would be a great feature! I was surprised when, after I made a detailed mockup of a mobile app with links to simulate button taps, the mockup view didn't allow any interaction.