What would you say about facebook? I have an inactive account I always wanted to rejuvenate but didn't know how to. To me it's mainly a list of (freaky at your pleasure) "girls I always wanted but never got to know in HS" and being the stereotypical unpopular guy that's quite a bit of girls. (Strangely enough, I thought none of them except maybe the ones in the same grade would remember me. Last week I've approached a girl I didn't remember and she said she remembered me, and the only time we saw each other is when passing by on school breaks)
(Anecdotal evidence warning)
Facebook seems variable enough that it would depend on your social circle. I think Jacobian's points about standing out are relevant, though, if you want to give it a try. Do you dance? The friends in my "dancing" group seem particularly responsive to flirting and dating behaviors through Facebook, provided that they're not constant or aggressive.
I would probably not be very successful if I used Facebook as a means to find a partner, given the culture of most of my Facebook friends.
There's a lot of data and research on what makes people successful at online dating, but I don't know anyone who actually tried to wholeheartedly apply this to themselves. I decided to be that person: I implemented lessons from data, economics, game theory and of course rationality in my profile and strategy and OkCupid. Shockingly, it worked! I got a lot of great dates, learned a ton and found the love of my life. I didn't expect dating to be my "rationalist win", but it happened.
Here's the first part of the story, I hope you'll find some useful tips and maybe a dollop of inspiration among all the silly jokes.
P.S.
Does anyone know who curates the "Latest on rationality blogs" toolbar? What are the requirements to be included?