What social media services do you use?

Feel free to provide a link to your tumblr, twitter account, or what have you, but I'm interested in knowing what social media services you all use. The reason for this is that in the new YWS renovation, I'd like to provide a way for you to link to your profiles on other sites. But, I only want to do that for the most popular sites.

So, what social media services do you use?

Facebook, formspring, tumblr.

Facebook only.

Facebook. I have a twitter, but I rarely use it nowadays.

Facebook and, on rare occasions, Twitter.

fb, formspring, twitter, tumblr. I rarely use formspring though.

The one and only Facebook.

That's it.

Just Facebook for me too.

Facebook, though I've been dancing around the idea of trying Twitter for a while now!

Facebook, tumblr. More the latter than the former.

^ that.

Facebook. I hardly use my twitter account

Facebook. Occasionally Twitter.

Facebook.
Google +

And very rarely - twitter and formspring.

Facebook, and Twitter more to read than to say stuff, really. Just started using Google+, too.