14Oct/111
Adobe discontinues AIR for Linux; x64 .deb download available here
My understanding based on Adobe's public commentary is that third parties will be distributing derivatives of the AIR program that will be available on Linux. In the meantime, I'll make my X64 copy of the Debian/Ubuntu .deb file for the 2.6 version available here.
Much thanks to Ronny Roethof for his entry on converting the 32-bit .deb to X64.

October 24th, 2011 - 17:26
Thanks for the copy of adobeair.deb
Adobe in their wisdom have not only stopped supporting linux but also have removed the download, so although plenty of apps still use it the download is not available from Adobe.