Ask HN: Social Networks users actions flow charts & wireframing

A long time ago(at least 2 years), I remember I saw a website that published the different actions that the users take on websites like facebook, twitter, linkedin, flickr, etc The guys made this possible using flow-charts and illustrating everything.. It was a kind of wireframing & prototyping of the whole process of the users on the before mentioned social networks..

for example, with facebook: The visitor signup the form on the website, then it adds personal information (birthdate, educaction & interests), then it logins trough his email(gmail, hotmail, etc) and search on his email contacts for friends that are currently registered on facebook. After that, it adds their contacts as a friend on facebook, and with the contacts that they don't have facebook, he can send them an invitation to become a member and share information on facebook.

I know, the things that I wrote it seems like pretty obvious.. but these kind of information it was very useful to me when I was developing a web application on differents sheets of my notebook.

And when I saw that website, I remember that I added to my magnolia bookmarks ..but last year magnolia lost all the bookmarks of their members, so I lost that website... and I can't remember the url

So you know some website that currently it's online and that it publishes the kind of information that I'm looking for? or at least, some similar content ?

Thanks a lot.. any suggestion it's greatly appreciated