Balsamiq Mockup is nice, but I'd like something similar that could produce something that I could distribute to clients that would allow them to click on elements and move between the mockups. Not looking for any fancy navigation - just the ability to move from on screen to the other based on what it click - like "hyperlinked regions".

I find that end-users often find it difficult to understand the flow of the application from a set of static mockups.

I really like the "hand-drawn" look as it stops end-users focusing on the detail too early, so I want something with that kind of feel.

Does Sketchflow provide this kind of functionality? Are there other tools that provide what I'm looking for?