Just finished the small is the new big, by Seth Godin.
I am simply speechless! I have been a fan of Seth's since I first read the Purple Cow and subsequently signed up to his blog. I find myself looking forward to his posts on a daily basis.
This book is a compilation of many of the blog posts (riffs) that he has commingled over the last 6 years. Brilliant and over the top worth it! It's beyond "must own," if you don't have it go get it now!