There is definately demand for an automated link system, but Simmo! there are quite a few on the market and you will have to build a better mousetrap in order to make this a successful application.
I recommend you study the feature set that this product offers as a bench mark minimum and add additional capabilities from there:
http://www.reciprocalmanager.com
If you can encompass all that that one offers and make it a server resident software solution I will buy it and I am sure MANY will.