ChurchRelevance.com has posted their top 33 church logos.
Developing your logo is so important. It is your LOVE MARK when used correctly and it is a gun to your head if not properly designed. Logos are SO important. Love Marks are the marks that when we see them we have amazingly good feelings (apple is a love mark). Bad logos can turn people off to your brand or product before they even give you a chance. (this includes your church)
Put time, effort, and strategy into your logo. It is important to develop your logo as your logo should in theory go before you and prepare the way for the rest of your DNA. I know it probably sounds like I am placing to much emphasis on your logo, but I am not. INVEST!