So I'm writing an article for iStockphoto's main page that's inspired by the stock-photo-cover sharing that happened over in this thread
. It's all about interviewing designers about how they've used stuff from iStock (preferably how they've used an image multiple ways, or how multiple people have used the same image in different ways, like the gold leaf that keeps popping up).
I've written numerous articles for iStockphoto and they average almost 12,000 reads per article, recent ones getting much higher eyeball counts. And I know for a fact that there are a ton of traditional RPG playing folks who contribute to iStock, so it's a great chance to get your work in front of a larger market. (I'd include a link to any of the products for sale, naturally.)
So if you've got something in print, or are working on something you're using iStockphoto for, let me know! And like I said, it doesn't just have to be RPGs, although that's the focus for this article.