It's to make this quilt top:
(I copied this photo from their website.)
Isn't it amazing?!
If you sign up early (before July 31) you can save $15 on the sign up fee. The blocks are only $25 per month and include the cosmo thread and fabric in the pictured colorway to complete them.
I am totally in love with this quilt and want so badly to sign up, but I've got so many BOM's going right now that I just can't justify adding another one to the mix. *sigh* Maybe if I can get some of these wrapped up before the October kick-off I could justify it a little more?