Various Official Google blogs and other helpfull blogs links.

Official Blog feed
Webmaster Blog feed
Adwords API feed
AJAX Search API feed
Analytics feed
Blogger Buzz feed
Base feed
Checkout feed
Code feed
Data APIs feed
Docs and Sheets feed
Enterprise feed
JotSpot feed
Maps API feed
Reader feed
Research feed
Talk feed
Video feed
Web Toolkit feed
Inside AdWords feed
Inside Book Search feed
Inside Desktop feed
Inside Sitemap feed
Googlers’ Blogs feed
Other Related Blogs
Google Blogoscoped feed
Search Engine Watch feed
Inside Google feed
Gadgets, Google, and SEO feed
MSN Search feed
Yahoo Search feed
The Holistic SEO feed
John Battelle’s Searchblog feed