Noise Ninja for Aperture

Single Image: This is a detailed 15 minute tutorial on applying Noise Ninja to a single image. (alternate link)

Batch Processing: This 4 minute tutorial covers how to apply Noise Ninja to multiple images for batch processing. (alternate link)

Noise Ninja Standalone Application

Lightroom: This 6 minute tutorial convers how to setup and use Noise Ninja as an external editor for Lightroom. (alternate link) For batch processing with Lightroom using Noise Ninja's Sidekick mode, please see this FAQ entry.