feature requests

What about gradient pngs using this module's functionality as integration with yours? http://drupal.org/project/imagene
The imagene specs just look for a path like this for the background image: sites/default/files/imagene/gradient/100-ffffff-eeeeee.png and magically creates the graphic and stores it in that folder. It works really well.
Here's a sample snippet of using that module with designkit below that creates a 100px tall png with top/bottom colors using php variables.
.header-group-wrapper { background: <?php print $gradient_bottom ?> url(/sites/default/files/imagene/gradient/100-<?php print substr($gradient_top,1) ?>-<?php print substr($gradient_bottom,1) ?>.png) repeat-x left top; }

I think this could be done fairly easily with your module by just creating a form option between the current "background" and "gradient background" and if gradient, creating 2 colorpicker fields (1 for top color and 1 for bottom color). I like the idea of your module better at the moment then designkit because of the ability to have presets and external stylesheets rather than page display output. Any interest?