I love BOM's, but there are lots of free ones around, you don't need to pay those exorbitant prices to do one.
I am doing a scrap one right nor from Erik's Homemade Ezine:
http://erikhomemade.typepad.com/erik_homemade/
We're getting towards the end now, but all of it is still online and can be downloaded.
Claudia's Quilt Shoppe is doing a row BOM which is kind of fun also.
http://www.claudiasquiltshoppe.com/freebom.htm
There's a lot of members here involved in that one.
Block Central also has a free BOM:
http://www.blockcentral.com/bom2010-intro.shtml