Have you ever thought about putting some of your art on t-shirts, ipod cases, greeting cards and more? What about specifically designing things for these and similar products. There are a host of new sites that provide such a service, and allow artists to make a little profit from the items on the products. The sites do the work of creating the product, packaging, shipping and customer service. All the artist has to do is post their creations and promote them.
For artists, the main advantage of these sites is not the selling of art (although this would be great), but the fact that using these sites to promote and brand yourself can be extremely effective. Of course, that would depend on the genre or style of art you create… and how many you sell.