Places to sell photos online.. for real cash, please?

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Now i'm a part of ShareAPic but it's going to take me forever to earn on there for poor pictures that I know noone would be interested in purchasing. With that being said, i'm looking for any and all legitimate sites where I can sell my pictures I take of nature & other random things online. Possibly even places where I could sell artwork as well. Might as well ring a profit for my skills in taking pictures & help some of my friends to earn a profit off their artwork! Also, if you can fill me in for those of you who know any information about the following sites & their legitimacy when it comes to selling photos, that would be great: DeviantArt, ShutterStock, Big Stock Photos, Crestock, iStockPhotos. Thanks in advance!