I’ve created a WordPress plugin to insert coinwidget.com widgets into your posts and templates as shortcodes. See coinwidget.com for more information
For example, the following code
[coinwidget address="12uaFq9CyGZBoT6nSbVzZ2AjGnZkfRSHoy"]
Will insert the following button in your posts or themes.
You can download the plugin from here until it is published in the WordPress Plugin Directory
Update: The plugin is now available throught the WordPress Plugin Directory