This little bit of HTML is buried in the source code at
http://www.apple.com/powerbook/:

<!—BEGIN AVENUE A—>

<img height=’1’ width=’1’
alt=’’
src=’http://switch.atdmt.com/action/apple_g5_powerbook’>

<!—END AVENUE A—>

</body>

</html>

Either it proves the existances of the mighty "PBG5", or someone at Apple has a very sick sense of humor.