http://www.readwriteweb.com/cloud/2011/06/google-infrastructure-obsolete.php

pointing to
http://rethrick.com/#waving-goodbye

This guy has worked for Google Wave. That explains everything.

From his blog post:

<<...But the software stack on top of it is 10 years old, aging and designed for
building search engines and crawlers.
And it is well and truly obsolete.
....
>>