Hi! I just wanted to shamelessly plug my group. It's new and it needs subscribers. If it takes off it will become an amazing place to actually create art together instead of just posting for oneself.
If you would like art to be cooperative, if you want to know artists and make people look at your stuff, you should try it out.
It's like a game but with art! All rules are on the page:
art-chain.deviantart.com/