Just call me a joiner. If there's a swap, quilt-along, BOM, or some other joint effort that I can participate in, I'm probably going to give it a try. I just joined the Liberated Round Robin blog and finished my first step today.
Unlike regular round robins, no fabric or blocks are sent away. You receive a set of general instructions for each step, make it yourself at home, and share your steps on the blog. I'll be sharing both there and here.
The first step suggested starting with an orphan block and doing a little slashing and inserting. Since there are really no rules, you were encouraged to do anything else you felt like.