I've never had success getting JVs when using the traditional approach, so I always use reciprocity. I go and become somebody's #1 affiliate or promote the heck out of them for a week, and that gets me onto their radar screen. Oftentimes they contact me with a, "Hey thanks, what the heck are you doing - it's working well!"

When they contact me first, that's a good sign.

Use the reciprocity, and they'll not only feel like they "owe" you a JV, but they'll be excited about it.