Just get facebook if you haven't. 95% of the pilots I know have a facebook account, to include many of my past examiners, and it is the easiest way to reestablish contact after a long time. No need to keep track of emails and phone numbers which change over time. Very very few pilots I know have a linkedin account, and I know that facebook is more social networking and linkedin has a professional side to it, but facebook makes it so easy as long as you keep your page clean (but the occasional eagle driver try to post something dirty now and then).
My wife made a facebook page for her small business and she has realized that her clients respond to much more information posted on facebook than on her actual website.