I am a member of serveral social media. I am on Twitter (integrit_ethic), Linkedin and I have three pages on Facebook. One is a normal Facebook page and the other two are related to my business and website (myqualitywriting.com and AuBuchon Books, articles and services).
I have found that my exposure for my expertise has grown through these social media outlets. I do have an account on Myspace but have not used it in quite a while.
Thanks for asking the question.