UI for authoring SCXML documents

All - I'm working on an implementation of SCXML for MarkLogic (http://www.marklogic.com/), and I'm curious if SCXML users have UI-driven tools for authoring and managing SCXML documents, or if they are largely edited by hand using text/XML editors.

Related to that - has consideration been given to some sort of integration between BPMN and SCXML such that the output of a BPMN tool could be transformed into an SCXML document? I don't know enough about BPMN to know if this is feasible, but it just seems like SCXML could use some sort of UI for making it easier to author/manage SCXML documents.

Thanks,
Rob