When doing research on integrating a SQLite Database into AIR I came across the following useful resources:

Learn what SQLite is About:
Introduction to the SQLite Database – David Tucker

Getting Started:
Introduction to SQLite in Adobe AIR

Tool for Creating and Modifying SQLite Databases:
SQLite Firefox Extension

By using a SQLite database it will be easy to filter data returned by services based on tags. A demo application that uses SQLite will be coming soon. Feel free to comment with any additional resources or cool demo applications that use SQLite.