One Million Edits has 16 shades of grey, but most editors are sticking with black so far, I think because so much real estate is available on the canvas. I'm interested to see how that changes as space fills up, and also when artists will start collaborating on larger areas together.
Assuming everything goes as planned, it's a little under 24 hours until this opens up so I thought I'd talk a little more about what this is, how it works, and what's so interesting (to me) about it. Part of the fun (again, for me) is that the idea started off as high concept art, then as I worked on it became silly web fun, then eventually found it's way back to art.