Ars Technica

http://arstechnica.com/

The PC enthusiast's resource. Power users and the tools they love, without computing religion.

Official Google Enterprise Blog

http://googleenterprise.blogspot.com

Official Weblog about Google's enterprise search appliances and other tools for business users.

Official Google Webmaster Central Blog

http://googlewebmastercentral.blogspot.com/

The official weblog on Google crawling and indexing, and on webmaster tools, including the Sitemaps facility.