Have you got some skill and you want to make graphics for others? Make a thread! Perhaps you see an artist out there with who spews win and you want something for yourself... If they have a thread, read their rules and see about a request!
For everything that doesn't fit in the first two graphics subsections, there's mastercard... And when that doesn't work, there's this section. Feel free to discuss things like graphics you may have found elsewhere, and even nerdy photoshop chat!