First, the entire first spin of the Zigduino r2 sold out in two weeks. Since it's Chinese New Year, and our bare PCBs are made in China, it will be several weeks before we have more in stock. However, for those of you who do have them, we've got some amazing new documentation to show you.
As you can see, it covers every pin and every function. I love these diagrams, and I am very glad pighixx was willing to create them for us! You can also download a PDF version.