Connectivity: Tony Bradley's networking blog

Cisco IOS Hints and Tricks: Ivan Pepelnjak's blog on the finer points of Cisco routing

Network Security Blog: Martin McKeay's observations and podcasts on network security

Cisco Blog: Jeremy Cioara writes about working with Cisco technology and networking in general

Paul Gillin's blog:Social Media and the Open Enterprise How social media and open computing are changing the business world.

David's Cisco Networking Blog: David Davis discusses how to use Cisco routers & switches, Cisco Certifications, and news about Cisco Systems.

CiscoSubNet

Cnet Technology Blog

Happy Router

Enterprise Linux Log: A SearchEnterpriseLinux.com blog. Blogger Jack Loftus' clever, irreverent Linux musings

The Asterisk Blog: Tips and tidbits about the open source PBX, Asterisk

Open Source Juicer: Dave Roberts' blog about Vyatta and open source

The Platform: The Cisco Official Blog

CCIE Pursuit