Eric thanks for introducing swikshare to the PH community. We just started beta recently and are excited/anxious to get feedback.
My name is Apurva and I am the founder and principal architect of the platform.
We believe that visual state machines are a natural and intuitive fit to UI prototyping. Managing complexity, however, can be a challenge, so with Swik we try to ensure that your prototypes can scale. Check out some of the examples in our interact gallery: http://swikshare.com/#interact
Tutorial and samples in the make section are the best place to start: http://swikshare.com/#make
The platform is free to use so hope you will take it for a spin and send us your feedback.
Startup TV
Swik App