Interesting part - basically something like Visual Basic, just with AppleScript as the language. Sure, you can do some of that with AppleScript Studio, but FaceSpan was quite a manageable software under OS Classic back then, and if they were to transfer that concept to OS X, it could be very interesting. Especially through the support of scripting systems (Apple Events as well as Cocoa Scripting), you can nicely integrate other applications - FaceSpan would thus be ideal for creating graphical automation tools. Basically what TCL/TK is under Unix.
At welcome to macscripter.net | applescript and script resource there's the original article.