Let me first start by saying THANK YOU! By simply thinking outside the box and trying to expand your knowledge about a subject says a lot about you. "We" Investors thank you, and wish more of you were around. :)
Now....I will tell you that I listened to my favorite PodCast a week or two ago (The Real Estate Guys) that may be a good starting point (as I'm not sure how much you know about Option Contracts or Assignments). Take a listen, it may be worth something to you. In the middle of the page click on "Considering Your Options - How to Control Property with Little or No Cash". Bob, Robert, and Russ start to mention assignments and the role Realtors can play into it about 1/3 of the way through.
P.S. If you want to learn how investors think....This is a great PodCast to subscribe and listen to on just about ANY topic.
Here is a link to Brian Gibbon's site where he try to help agents on Options (maybe not as much on Assignments):
Without knowing the whole scope of your question, if you want to expand a little more, maybe I can help.