CIO Magazine: RITLAB

The most comprehensive site to learn how to "Run IT Like a Business".

ITIL: IT Infastructure Library

The original source on the hottest trends in IT Service Management

COSO: The Sarb-OX Standard

It's an odd name, but this risk-management organization is the standard for all Sarbanes-Oxley auditors.

Project Management Institute

PMI sets the standards for project management methodologies.

PMOSIG

The PMO Special Interest group within PMI. Join this group for access to great resources and discussion groups on PMO topics.