This weekend a took a little time to update the Rings gadget so that you can customize it.
Here is the customization page:
http://www.abowman.com/google-modules/rings/?edit=true
Note: If you want to enter a background image, you will need to enter the background image URL into the settings after you add the gadget to your page, because there is currently a bug on iGoogle that prevents that setting from working from the customization page.