Over 600 social networks and counting!

In my search on social networks I have never found a figure stating the exact number of networks which are around. Logical I hear you say: every day there is a new social network that sees the light and another that's being sold to a large corporation. The times that I have found estimated guesses they usually ranged in between 200 and 400 networks. As I am slowly finishing up my book on social networks, I can now say for sure that there are over 600 social networks out there as we speak (yes , over 600!).
It took me a while to digest this information -and an even longer while writing about them all :-) -but there you go.

In the mean time please continue sending me information on social networks which might have escaped my attention- if there is room for 600 why not make it 601?

ps I checked: there are no social networks in Zanzibar (where I spent my holiday the last two weeks).

These networks have pledged their support so far...

Just to give you an idea of the social networks we will be covering, I started this list of people who either sent me their "homework" already, or who have confirmed their interest to participate in the project.

I will update this list as the answers come in.

MuslimSpace

Rézonance

Bebo

Viadeo

Colombia4you

Piczo

SocalSpaces

MocoSpace

Mapalia

GoingOn

Shuzak

SocialButter

Hobnobster

Moblabber

CrickeM

Zooof

Topexecutivenet

Vingo

I have started by contacting those communities which email address were easiest to find,

so if you 're the founder of a social network and I haven't contacted yet, probably you're still on my 'tot do' list. However, if you want to make sure you're included, send me an email at adj (at) ulysses-consulting (dot) com.