I just finished reinstalling Ubuntu 9.04 and was trying to install my air applications. Not terribly difficult…

1. Download the installer from: http://get.adobe.com/air/
2. Install ia32-libs
3. Install lib32nss-mdns (from http://tr.im/jCFs )
4. Install your apps

I got stuck on the third step when I was going through things. I could install Adobe Air applications, but they had no network access. Installing that library corrected the problem.