I just make this plugin and this is a unique idea "I can say that!" Check here : http://wordpress.org/extend/plugins/wplm-worrpress-link-management/ This is about your wordpress link management. If you sell links in your wordpress blog then it will help you lots. This plugin automatically delete the links after expire, before delete the links it will notify the link owner about expiring his link and many more. You can check the details here also: http://wplinkmanagement.com/ Right now i have another unique idea about new plugin but i dont want to say that here!