New site was launched at
http://code.google.com/speed/articles/

(via /.)

Covered at
http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleId=9134736

too.

Google OS had already something 'bout it since the morning http://googlesystem.blogspot.com/2009/06/tips-for-making-websites-run-faster.html ... overall not <i>that</i> interesting...

Also see http://blogoscoped.com/archive/2009-06-04-n57.html