There are banners available, and more will be coming. The affiliate program pays out 20% of Onyx and poster sales, a number I cleverly arrived at through intensive research and complex mathematics (I took the normal commission from other Web sites' affiliate programs and doubled it).
Also, the poster pre-orders are at about half what they need to be for a print run, but they seem to have stalled. So if anyone wants to help me get the word out, you can copy-paste the HTML below into your blog--it'll put the graphic and a link to the pre-order page. If you link to the graphic on my server, it will automatically update when more pre-orders come in.
<div align="center"><a href="http://www.obsidianfields.com/zc/index.php?main_page=product_info&cPath=5&products_id=29" target="_blank"><img src="http://www.obsidianfields.com/lj/postergauge.jpg" border="0" width="150" height="140"></a></div>
Here's what it will look like: