The Adobe AIR beta 1 runtime installer leaves a lot to be desired. Adobe continues the blantant disregard for standard folders and proceedures on the Mac that Macromedia had, and this leads to problems. I had to do quite a lot of tinkering to be able to install it at all.
Multiple people have told me that a very limited amount of time went into grabbing this from the labs and presenting it at the conference (like measured in days – not even weeks). Combining that with Sun’s lousy track record with Java UI technologies, I quickly wrote off the release / platform.