I was just interviewed for a new job. We left that I would hear back, as often is the case. Normally, it would be acceptable to follow up with an e-mail thanking the interviewer for his/her time. However, in this case, I do not have his e-mail, but I could connect on linkedin.
I have never connected in this way after an interview with the interviewer, and I would like to know from interviewers on the site if they have ever been contacted on linkedin to be thanked for the interview, in absence of an e-mail contact, or not.