These sites prove that social networking can help you find a job too
BrightFuse [1]
Create a profile and network with peers and professionals in a wide variety of online groups
Linked in [2]
A networking site for professionals
Idealist
[3]Groups and forums on this site can help you find your dream job in the non-profit sector
Links:
[1] http://www.brightfuse.com
[2] https://www.linkedin.com
[3] http://www.idealist.org/