XUL?

I recently had to force quit a process called "xulrunner.exe". After a little research I found that Songbird uses XUL, an HTML-like markup language for it's media player. A sigh of relief came over me as I thought I had picked up a virus. Apparently XUL apps have to run xulrunner.exe. Wouldn't it be great if they could port it to Adobe AIR and have their own exe? AIR seems to provide most of the functionality that the media player has. (Not sure about the OS level availability of USB inputs, etc.) It would be nice, and probably cooler, if they ported Songbird to AIR!