Church Marketing Sucks is a blog that seeks to "frustrate, educate and motivate the church to communicate, with uncompromising clarity, the truth of Jesus Christ." It hosts some helpful and interesting reading. Listed under their "essential reading" category is What is Marketing?, which defines marketing and deals with goal-setting for churches and standards by which goals can be measured ("That which is not measured cannot be improved"). I found several thought-provoking posts within their Philosophy category. And, not to be missed, they also offer resources for not sucking.
[UPDATE 03.01.2005] Due to the complaints of many regarding the use of the word "sucks", the blog administrators have also offered an alternate link, Church Marketing STINKS. Here is the press release regarding the alternate address.