Hi,
I am working on this. It's a long haul, but basically, it's important to bring such introspection feature.
It will work by scanning your project and create an xml representation of all PlayMaker related properties, so that then it's possible to start making xpath searches, which are very powerful. So indeed, we'll be able to find fsm by name in scenes that are not even opened, or find a state on an fsm in any scene or prefab that has a given action with a given property value. All this will become possible, and more importantly opened to contribution for creating search tools or even adding your on bits of information if you find the core suitable for your own project needs, like documentation, or data driven content generator.
Bye,
Jean