I have been looking at Adobe AIR for a project that I have been working on as it fits into the main requirements (like running on both PC and MAC), and also because I already know Flex quite well. While looking at some of the requirements of the project, it can be quite frustrating to "trawl" the net for examples and docs on how to do specific things, so I have started a book on some of the small side apps that I have created to test out my "how to" questions. So now I have 2 online books on the go I have grouped them together under a single menu (mainly so its easy for me).