It is a volume of daily devotionals for Advent/Christmas. Proceeds from sales are going to support the residents of the US Gulf Coast affected by hurricane damage.
You can find the book here (the price will go up in a couple of weeks):
A Light Blazes in the Darkness:Advent Devotionals from An Intentional Online CommunityOn Sale now for $9.99! down from retail price of $12.99.
A colleague of mine found out that Lulu offers free international shipping for orders of $25 and up. I plan to order after talking to some people on Sunday about it.
The RGBP are also starting planning and work on a devotional book for Ordinary Time. For more info on that go to the RGBP blog.