I first heard of Joint Ventures I thought how obvious it was people should join forces to do programs to help each gain visibility.
I was surprised actually, someone had made an issue of it, but pleased more people would realize the benefit of being able to increase their visibility by joining resources. Joint Ventures are the easiest and fastest way of being able to build your database and have more people discover your expertise.
I use Social Media to find potential Joint Ventures. I have found I have to assign a specific time, fourth week of the month, Thursdays and Fridays to generate the level of relationships which will create rewarding venues.