Official Google Blogs Directory

Google now has total eleven official blogs. 

Official Google Blog - http://googleblog.blogspot.com/
Adwords API - http://adwordsapi.blogspot.com/
Blogger Buzz - http://buzz.blogger.com/
Google Talk - http://googletalk.blogspot.com/
Google Video - http://googlevideo.blogspot.com/
Google Reader - http://googlereader.blogspot.com/
Google Adsense - http://adsense.blogspot.com/
Google Adwords - http://adwords.blogspot.com/
Google Desktop - http://googledesktop.blogspot.com/
Google Sitemaps - http://sitemaps.blogspot.com/
Google Base - http://googlebase.blogspot.com/

You can subscribe to all of them by importing this opml file in your newsreader.