Online reputation managing company Reppler surveyed 300 "professionals" who participate in "the hiring process at their companies" to figure out the relative importance of job applicants' social media presences. Their findings: 9 out of 10 employers report using social media to screen prospective employees. 7 out of 10 report rejecting candidates based on their social media presences—and roughly the same number report accepting candidates based on their social media presences, too.
Obviously, Reppler has a vested interest in these results. All I'm getting out of this study is "damned if you do, damned if you don't, may as well go get drunk and pose for pictures vomiting in the back of a dive bar." [Reppler, Forbes, Atlantic]