I lead marketing for an industrially focused B2B SaaS business.  What are the top growth success stories and best practices that I can learn from?
  
  
  I'm unclear about your requirement for "industrial".  But i can offer Nimbus Portal Technologies as a success - they offer document management and secure team/client communications in the cloud. http://www.nimbushome.com/
They are the dominant supplier in AU/NZ mainly because they integrate with Practice Management software.
If you can clarify your question further, I may be able to better answer.