1.3 Billion Now Registered to the Top 60 Social Networks

Always a challenge to get validated and public information from social networks....ironic given that they suggest they are so open and transparent in their dealings. Whatever.

With the help from one of my favourite Wikipedia pages, we believe 1.3 billion people are registered users on some of the top 60 social networking sites indicated here (and yes, I recognize some of the biggies are missing here and we're talking registered users, not visitors and not regular users).

Now here's a better question, "how many servers do you think are powering the networks below?":

                                                                                                                                                                                                                                                           

Social   Network	Registered Users (M)
Windows   Live Spaces	120
Facebook	115
MySpace	110
Habbo	100
hi5	70
Orkut	67
Friendster	65
Flixster	63
Classmates.com	50
Bebo	40
Netlog	36
Reunion.com	32
Tagged.com	30
flickr	27.4
Xanga	27
imeem	26
Adult   FriendFinder	22.3
LinkedIn	22
Skyrock Blog	22
BlackPlanet	20
Friends   Reunited	19
Mixi	18
Sonico.com	17
V Kontakte	16
Fotolog	15
Geni.com	15
LiveJournal	15
Plaxo	15
Badoo	13
Nasza-klasa.pl	11
Buzznet	10
Odnoklassniki.ru	10
WAYN	10
Multiply	9
Care2	8.9
PerfSpot	8
StudiVZ	8
myYearbook	5.1
XING	5
Hyves	4
MiGente.com	2.8
Cyworld	2.1
MocoSpace	2
Stickam	2
iWiW	1.7
Fubar	1.2
Twitter	1
Gather	0.5
IRC-Galleria	0.5
Ryze	0.5
LibraryThing	0.4
aSmallWorld	0.3
Bahu	0.3
Broadcaster.com	0.3
Hospitality   Club	0.3
Elftown	0.2
Faceparty	0.2
MyChurch	0.14
TakingITGlobal	0.1
Ravelry	0.08
	1313.32