AIR is a wrapper around HTML (or Flash) that add OS-level hooks. It's like a super-charged Javascript. For instance: want to write to the file system? In AIR, J

AIR is a wrapper around HTML (or Flash) that add OS-level hooks. It's like a super-charged Javascript. For instance: want to write to the file system? In AIR, Javascript (or Flash) gets an easy way to do this. BTW, for anyone hacking AIR on the HTML side, check out ExtJS. Best JS framework I've seen for developing apps that look "app-like".