Mike Chambers and Frog Design have done an excellent job compiling an alphabetical reference for all native ActionScript APIs for the Adobe technology platform runtimes: Adobe Flash Player and Adobe AIR, as well as the Adobe Flex framework APIs.
Use this guide both as an API reference and a tool to learn about the ActionScript APIs available within the runtimes. Mike says that this document is released under a Creative Commons license (people can redistribute, edit, and print). You could probably even have the source Adobe InDesign file if you wanted it. It’ll definitely be handed out at conferences — and maybe even the on AIR Tour now crisscrossing Europe.