rj001,

I misread I think the original post somewhat. I thought the use of the model was in question rather than the render. If you are trying to get your renders used for publication you might think about advertising in the message forums the use of your renders at places like lulu.com. There are many self publishing sites like this where the authors are starting out as writers and publishing their first book, but need  cover art at an affordable price. You also might be surprised at what they will pay to use it...

tjohn, I think you don't realize how useful and good your stuff really is. Many many artists that work the way I do are always on the look out for things such as you create. Sometimes it's the simplest things too. It doesn't neccesarily have to be textured well either. (not that your's aren't ;-)) Many times I will render a scene in Bryce with no textures at all, so that I can get the layout without having to mess with perspective, and finish it up in painter, or photoshop. It's the shape of the object that matters most. If I were you I would try selling at a reasonable price as a test. You just never know..... Even if you don't sell anything the only thing you lose is a little time.