Display currently playing iTunes song as iChat AV status

From Mac OS X Hints.com -
It looks like iChat AV is scriptable (at last!). One easy application for this is to set your status message dynamically, to say, the song you are listening to in iTunes. That script would look something like this:

OS version: OS X

on idle
 tell application "iTunes"
  if player state is playing then
   set a to artist of current track
   if a is "" then
    set a to "mysterious unknown music"
   end if
   set a to "nothing"
  end if
 end tell

 tell application "iChat"
  set status message to "listening to " & a
 end tell

 return 20
end idle