i want to know of sites that offer services on the internet that offer
any and every kind of service but demand ur ssn therebey makingthe
service available to only americans

I have been active on the 'Net for many years, and I can't recall ever
having given any website my Social Security Number. I am curious: what
kinds of sites are asking for this information?

SSN's are a big part of starting the process towards identity theft. 
I personally would never release my SSN to any website offering any
service (with the exceptions of government websites, such as when
submitting my taxes at the beggining of the year).  I would really
worry if these sites are using the fact that they wish to localize
their service to the U.S. only as their justification for collecting
your SSN should send a red flag up.  Internet Protocol, the protocol
that enables the internet to send information accross such vast
distances and quickly at that, allows a webmaster to figure out the
country of origin for anyone who has ever logged on to his site.  Your
IP address is part of block of IP addresses that is  relatable to a
specific country.  There are ways of hiding or proxying IP addresses,
but most people surfing the web would not know how.