This three-phased study examines corporate blog use, specifically the impact and value of blogs on organizational social capital and knowledge sharing at Dell Inc., a global computer manufacturer. The impact of social-mediated Web 2.0 technologies on organizational social capital has received limited attention in scholarship, possibly because of the inevident connection to measurable economic value and newness of the technology. Our findings indicate the corporate blog can be used as a sustainable forum leading to a shared understanding of organizational roles, increased sense of group cohesiveness, improved work processes, and improved professional and personal ties among employees in the organization.