I mentioned the KindleBoards here last week, but here's more detail about them. They seem like a great resource for people looking for independent authors for their Kindle, but it is a real mess there. I've been promoting "The Job" there for several months. But if you're looking for a particular kind of book, it's like being lost in a tangle of roots underwater.
I've tried to help myself (and others) in this regard by starting a couple of discussion threads, Writing for the Spirit and Kindle-ing the Flames of Wit. Their themes are, hopefully obviously, spiritual writing (avoiding the red flag word "Christian") and humor writing. My hope is that visitors who like these genres will find the threads and see books there that interest them. The advantage to authors of threads like these is collusion -- get all the authors in a genre to work together posting regularly, and the thread will stay near the top of the list where visitors to KindleBoards can easily see them. Every author who posts there gets exposure for his or her book without flat-out promotion. That hasn't been the case the "The Job"'s thread, because nobody posts there but me, and I can do that only once a week.
So this is another angle on Internet marketing. If you are interested in either genre, I invite you to visit the threads and participate in the conversation.