Chunky-Monkey is a Python Library for the Shopzilla API. This Python Library monitors how chunks of a web page are sent to the client browser. This library is authored by sz-alook and documentation can be found on GitHub.
MyBantu is an interesting little mashup, available as an iPhone app, an Android app, and a website. Its goal is to make shopping for anything, especially restaurants and movies, easier and more social. It uses Yelp API, Netflix API and various others to make it happen. It's very similar in idea to Siri, the "ultimate mashup" that Apple later gobbled up in the largest mashup acquisition ever.