Recently I've started a new blog with my friend Daryl Morris, called Colaboratay. The idea is that one of us starts a picture off, posts it to the blog, the other picks it up and adds to it, posts their new version up, and so on.
We've not been going very long, but it's produced some interesting ideas already, and as each project continues I think the ideas are going to get both more concrete and also more outlandish.
Here's the current stages of the two projects currently underway:
Unknown Stage 2, most recently worked on by me.
Zeal Stage 4, most recently worked on by Daryl.