For image-based answers, I display the image thumbnail, which is clickable into a new window, and also includes descriptive text, like so:
Code:
<a href="path to image" onclick="window.open(this.href, '','resizable=no,status=no,location=no,toolbar=no,menubar=no,fullscreen=no,scrollbars=no,dependent=no,width=800,left=500,height=800,top=100'); return false;"><img alt="" src="hpath to image" style="height: 150px;" title="Close the window to return to the gallery page." /></a><h3>Image #659</h3><strong>Description</strong><br/><br/>Descriptive text using breaks instead of paragraph formatting.
It would be very nice, however, to have image-based answers as a default answer type, with the ability to load a thumbnail, and description. I think it would be a lot less clunky.