Tony,

Thanks for the question. At this time, Nintex is not directly building a connector for Cisco WebEx. However, we do encourage any customer or user who has a need or requirement for a system not on our roadmap to take a look at the Nintex Xtensions Framework for a way to bring that into the platform for their specific use case.

http://help.nintex.com/sdk/  is where you can find more information on that.