There’s a pretty good write-up on AIR for Linux developers in Linux Journal. It goes through most of the intro stuff to AIR that you should be familiar with and also what to expect if you’re using the alpha (because there are some things missing). I’m loving watching the Linux community get excited about AIR. We’ve got Flex Builder for Linux and you can use pretty much any JS tool you want, so it’s relatively easy to do development and deployment all on Linux.