One of my favorite designers, Esther Aliu, is launching a new BOM today. The blocks are free for one month. She has a Yahoo Group for members working on her BOMs that you can access here. She also posts regularly on her blog, which you will find in my 'blogs I follow' list, scroll down on the left.
Esther's patterns are wonderful. You may be familiar with her Cherry Thieves, Red Delicous, 12 Days of Christmas, or other of her works.