I've thought about what book I would be interested in writing next and I'm going to have to keep thinking as Jason Caston has written what I would consider the best next step after the Social Media Guide for Ministry. Jason discusses Social Media in this book, but goes far beyond Social Media getting into websites, mobile applications, online church, and so much more. Take a look at this video:
Jason's book is packed with step by step practical application and the system is applicable for churches of any size or budget. I really can't recommend this book more.
Check it out on Amazon here.