For those of you who do not follow Rebecca Irvine's blog, you may have missed the report she posted last week. She surveyed over 400 LDS readers to find out their buying habits and interests. I definitely recommend all authors look this over and watch future studies to see how habits and interests evolve.
Additionally, this is a great example of having a blog of value. Generating reports like this is something Rebecca does professionally, and she's sharing the wealth of her skills with anyone willing to click on a button. Go Rebecca!