Came across the BAFAB website in during my perambulations, and it's such a nice meme-ish thing I thought I might climb on board too.
The site is the brain child of lit-blogger Debra Hamel. It urges visitors to buy books "for no good reason" and pass them on during Buy a Friend a Book Week (held in the first weeks of January, April, July, and October) to spread the joy of books and promote friendship. There are some cool stickers to slap on your blog to show you're taking part.
Your reward? Great bookish karma, of course. And warm fuzzies of the heart.