Extend Jetpack's Photon CDN to images in NextGEN Galleries.
If you're using Jetpack's Photon CDN, this plugin will extend the service to galleries created with NextGEN Gallery. Just activate it and gallery images are automatically served from Photon.
NextGEN Gallery's image size settings are respected, meaning you can update your gallery image sizes on the fly without regenerating images.
Leveraging the WordPress.com's cloud, your galleries should load faster and use fewer hosting resources.