WordPress.org

I want to add another Social Bookmarking icon for AnotherDigg.com

You have 2 options. 1. change yourself the plugin. 2. Let me know what do you need. The best way is to add the desired feature on openversion.com and you'll get a notification when the feature is implemented. Just follow the link in the admin pannel to request a new button.

I need a new feature

See the previous point.