What are the top 10 or 20 (I will tip well for 20!) Social Networking
Sites in Europe (like MySpace, Friendster, LinkedIn, and hi5 in the
US) ranked by number of registered users, monthly visitors, or monthly
page impressions (whichever metric is most widely available, or a
combination of the three is fine)?  For each of these 10 Social
Networking Sites, please provide the home page URL, the country of
incorporation, the main target countries & languages of the site,
number of registered users, monthly visitors, monthly page impressions
and any other key data.  Please feel free to ask for clarification if
my question raises any questions for you.  Thanks in advance for your
answer.