My niece recommended this book, based on the blog Stuff Christians like, and it was awesome! A very humorous look at a Christian culture that sometimes takes itself way too seriously. At the end, he put in a few of his 'serious Wednesday' posts, which are ... more serious. His mustard ice cream story really resonated with me (as, apparently, it does with a lot of people).
It was also a ton of fun to listen to the audio book version of this because he reads it himself and interjects extra stories that aren't found in the printed version of the book.
It's been fun to watch his blog and follow him on Twitter over the last year (over 2010; I'm writing this in 2011), as he moved from a so-so job into joining Dave Ramsey's team.