I spent a good 3 hours today trying to figure out exactly how to get NSTables working while using RubyCocoa. Now that I finally figured it out (to a minimum extent), I wanted to share the wealth.
Here's a screencast I made. There's no audio on it, but the video should be good enough to understand what's going on. This screencast how to create a RubyCocoa application which pulls search results from Amazon using their Web API and populates a table.