Matt, I have yet to put any my art on the forum, though it not that good.  Below is a link where I have it on devianART.  I don't think anyone has viewed it since putting it up, but it doesn't matter.  To me, like writting, art is love.  If no one other than me views or reads it, its their loss.

http://aura-dawn.deviantart.com/gallery/

On your site you mention to writers that you can be their illustrator or book cover artist.  You best direct that toward the editors.  Editor's encorage writers not to illustrate their books, that they have their own artist.   This is taken from the freelance writers guide to publishers.