I have read the terms of usage belonging to each of these artists. Different artists require different things before permitting their art to be displayed. In some cases they strictly forbid personal pages from displaying their work, and thus you will not find their artwork here. If you intend to use any of these images on your own pages, please go to the artists' sites and read their license information (though I'd like to complain to some of these artists for making the terms so darn hard to find!!!)
I do on occasion make an exception. Sometimes I am unable to find their copyright information (though I do try to contact the artist directly), or the artist does not have their own official website. If you see your art here and would like me to take it down, just let me know. And yes, sometimes I am bad and post up some images which are already *everywhere* on the web without permission...but only because I believe the damage has already been done.
I also try to ensure the images are of lesser resolution, and the artists' name will be prominently displayed on each image. Hopefully this will prevent people from printing/selling the images. I will also never post more than 6 images at one time, thus forcing people to visit the artists' sites to satisfy their desires. Again, I may make an exception for those artists who do not have an official site and there is nowhere else to send people to for more.
Most importantly, I do not profit by the presentation of these images (at this time I make no money off my page at all...in fact I am losing money to pay for hosting fees, etc). On the contrary, I hope that I am helping in generating interest in the work of these artists, and that I will drive traffic to their sites. Through other personal websites have I found artists whose work I absolutely love and would never have known existed. Thus I wish to do the same.
One final thing...I only just started doing this, there are parts of my site that I haven't gotten permission to use the artwork yet. For now, only the gryphons and unicorns are "legal". I will eventually get to the pegasus and mystical horse sections and clean those up. It may take me some time, but I will get around to it, I promise!