It takes a few minutes to acquire one- all you have to do is enter your company details and the number of people you will be distributing the application to. Don’t sweat, all you need to do is apply for a distribution license.
Adobe does not allow distribution of the AIR runtime (via CD/DVD/LAN) without license.
Once your application is ready, you are encountered with the problem of distribution. I suggest you use Aptana for development as it has a good set of examples that can you help you kick-start development. How to create your own installer for an Adobe AIR Application and distribute it using offline channels (CD/DVD/LAN)
