Last.Fm Records shows cd covers for cds your listened to, according to last.fm. It can show covers in a page or post, and you can add it as a widget.
It's not easy to answer this question. Lots of testing has been done to make sure the plugin works in different browsers, and as part of different themes. If you are not seeing cd covers on your site, there are a couple of things you can check:
Installing the plugin doesn't add anything to your site. You have to specify where the cd covers will be added. If your theme supports widgets, you can use them. To show the cd covers on a page or post, shortcodes are available.
Thanks to all the great feedback for this plugin, it is what it is now. I try to answer all questions in the forums and keep the users of this plugin happy. Strangely enough, this list sees little action.