I'm a part of this project! It's my first internet-a-long. My blocks are not on the quilts pictured, but I did submit three blocks for a red and aqua quilt. The parameters were that you had to improvise your piecing and submit at least one 12.5" block. They are being assembled into quilts and dontated to charity, and perhaps auctioned, with the proceeds going to charity.
The second half of the challenge involves creating your own "project improv." You are supposed to use a new quilting technique, improvise in some way, and challenge yourself to break out of your usual patterns.
Considering that I am a new quilter, it should be simple. Also, I really tend to craft with abandon, rather than with restraint, so this improvisational business is music to my ears. I have something in the works that I'll post soon.