At its foundation, PMOs provide a centralized point for gathering and disseminating project, program and portfolio information regarding issues, risks, schedule, cost, quality and other status updates. Various social media tools can provide the communication channel between the PMO, project teams, business leadership and stakeholders. Candidate tools include micro-blogs, RSS and Twitter.
General collaboration and knowledge management may be a core function of the PMO. In this case, it behooves PMOs to be on the leading-edge of social media and network technology to share best practices, company PPM standards, methodologies, etc. that it is promoting. Further, best practices in the use of social media and networks to manage projects may represent a new service offering for PMOs once they have practiced what they endeavor to preach.
Looking at this from another perspective, that of the professional communicator, we should go where the action is and where our contributions can provide the most benefit to the organization. A mature PMO holds significant influence over the methodology, processes, and tools used for cross company collaboration. After all, new service development and implementation of business improvements normally run through the PMO. Project managers act as lenses for directing and focusing information exchange and productive effort. I agree that communication services tried in the fires of project management often become standards much easier than trying to implement them as stand-alone initiatives.