It takes a year or more to get results.
Building up the relationships you need takes a lot of time. Most people buy into a social media program thinking it's going to happen by tomorow morning. It will not. Profiles and pages on Facebook, LinkedIn and Twitter take time to grow (especially Twitter.com since it's now rate limited). Blog audiences take time to develop. Facebook pages, LinkedIn groups also take time to develop.
Blogs are the center of the universe when it comes to social campaigns