1. A voice application creation and deployment system comprising: a voice application server for serving voice applications to clients over a data network; at least one voice portal node having access to the data network, the portal node for facilitation of client interaction with the voice applications; and a behavioral adaptation engine executable from the application server; characterized in that the behavioral adaptation engine intercepts client responses during voice interaction with a served application, analyzes them for one or a combination of behavior patterns and mood states according to pre-existing constraints and received client information, and determines which of a set of possible dialog responses including linked to or insert able options will be submitted for VXML page rendering to create a next enterprise response played to the client.