Sketchdaily is my favorite subreddit. If you haven't heard of /r/sketchdaily, you should really check it out (especially if you're an artist). Each day a new theme is picked. Everyone posts a sketch they made inspired by the theme. It's pretty awesome, and the community is very welcoming. Here's a link to the sub:
http://www.reddit.com/r/sketchdailyWell, now, Sketchdaily has its own Etsy team! I think it is the only subreddit to have one. Go over and join! Support other Redditors and check out their shops while you are there:
http://www.etsy.com/teams/14502/sketchdaily