One possible addition to consider in the future would be regular expression matching for the domain names and usernames. This could be an advanced feature so that it doesn't scare off users who don't know regular expressions.
Even without this suggestion, this plugin is wonderful.
The extension is absolutely free. It can be integrated with lightbox extensions if necessary to show original images into a lightbox. "ARI Fancybox" is a commercial extension, but "ARI Slick Gallery" can also be integrated with free lightbox extensions. A lot of customers find the extension useful and if you have any questions, feel free to contact us by email or via our forum and we will be glad to help.