Google Latitude
http://www.google.com/latitude/intro.html

See your friends' locations and status messages and share yours with them.

* * * * Fred wants to hang out with his friends, and checks to see where they are. My wife is on her way back from work. I'd better start preparing dinner now. Change your status message or photo. Check what your friends are up to from their status. Maintain complete control of your privacy. Learn more about Google Latitude Watch a video See where your friends are in real time! Enjoy Google Latitude on your phone, computer, or both. Start using it on your phone See your friends' locations and status messages and share yours with them.

How much do we colloborate or manage our weak and strong ties? This report suggests not as much as is often touted.

’s “In-House Sociologist” Shares Stats on Users’ Social Behavior

Facebook’s “In-House Sociologist” Shares Stats on Users’ Social Behaviorhttp://www.insidefacebook.com/2009/02/27/facebooks-in-house-sociologist-shares-stats-on-users-socia

Facebook users comment on stuff from only about 5-7% of their Facebook friends. And as has been shown by many other studies, women communicate with more people in all cases than men. “People who are members of online social networks are not so much ‘networking’ as they are ‘broadcasting their lives to an outer tier of acquaintances who aren’t necessarily inside the Dunbar circle,’” Lee Rainie, the director of the Pew Internet & American Life Project, says. - Tac Anderson

"...Facebook users comment on stuff from only about 5-10% of their Facebook friends."

Cool Twitter visualization tool.

RT @TomChapman: Fantastic Twitter social graph tool from @PeteWarden aka Mailana http://twitter.mailana.com

allows you to find who common friends/followers you have with other users on twitter

a bit like the facebook function that let's you see friends-in-common.

A new follower? Should you follow back? Find out if you have common followings with them, and which people you follow that follow them...

"Online friendship is better described along a spectrum defined by the actions people take and how we feel about them."

Spectrum of Online Friendship

Wow

From the website: "I’ve been in this people search industry for over 2 years now and while researching, I found many free, high quality free people search engines to help you reconnect with friends, family, school friends or any other person from your past. So I decided to put them in one huge list. Here they are:" - I haven't tried any of these but usually these lists are handy

Matchmaker app for Facebook. Search profiles of friends and friends-of-friends.

Freunde von Facebook-Freunden finden

The best way to meet people is through friends. Thread makes it easy to see your entire social network and find common friends using Facebook Connect.

Your friends know awesome people. Browse their Facebook profiles and see if you connect. You can ask a friend for an intro, or play matchmaker with your own friends.

Search for tweets from just your friends

Heel interessante dienst om makkelijk te zoeken in de tweets van degenen die jij volgt op Twitter

The average number is about 150, says leading anthropologist Robin Dunbar.

You can have friends because of what you do together or enjoy something together like football or shopping, but they're not as profound friends as those who you love for themselves because of something in their character.

Having more friends leads to earning more.

They usually consist of an inner circle of five "core" people and an additional layer of 10, he says. That makes 15 people - some will probably be family members - who are your central group and then outside that, there's another 35 in the next circle and another 100 on the outside. And that's one person's social world.

Attention Facebook users with 500+ friends: You are lying.

What's the ideal number of friends?

The more friends you have, the more you earn, says a study. But modern life can allow little time to maintain meaningful relationships, so what's the optimum number of friends?

FODA

What people you know like on the internet right now in

the aggregate of what everyone 'likes' on the internet, your friends included. just... wow. http://likebutton.me/ /via @samijae

interesting way to see what your friends are up to/like

Thorough article that deals with the criticisms of Twitter.

Twitter sucks, so change your friends

Twitter sucks, so change your friends. ? Steve Lawson: Bass 2.0 ? the soundtrack to the day you wish you?d had

There are three broad themes coming out in the Twitter critique: * That it’s full of trivial rubbish * That’s it’s reality TV without pictures * That is for narcissists and fosters mental ill-health (WTF??) To which I, not surprisingly, say ‘Bollocks’.

I used to love Facebook. I was in law school at Wisconsin when it launched, and everyone I knew on the site was basically a peer -- people who I'd known well or at least met in person at some point. Then... I graduated. Suddenly having a Facebook account full of pictures from blurry nights in Madison and Pulitzer Prize-caliber dirty jokes from my friends wasn't so awesome anymore -- especially once I started working for Engadget and lots and lots of people I didn't actually know (or, somewhat even worse, only knew professionally) started looking at my personal page. So I needed a system -- a way to still use Facebook to share personal stuff with friends, professional stuff with colleagues, and awesome stuff with everyone, all without blurring any lines or accidentally sharing too much with people I don't know.

I used to love Facebook. I was in law school at Wisconsin when it launched, and everyone I knew on the site was basically a