It's a dns attack most likely, nothing to do with MGS4.
http://www.thestandard.com/news/2008/06/06/briefly-amazon-com-offline
UPDATE: It looks like it could be a DNS issue. It looks like Amazon's DNS entry got hacked. Here's what results from a Whois search for Amazon.com:
Smokey:~ jlgolson$ whois amazon.com
Whois Server Version 2.0
Domain names in the .com and .net domains can now be registered
with many different competing registrars. Go to http://www.internic.net
for detailed information.
AMAZON.COM.ZZZZZ.GET.LAID.AT.WWW.SWINGINGCOMMUNITY.COM
AMAZON.COM.MORE.INFO.AT.WWW.BEYONDWHOIS.COM
AMAZON.COM.IS.N0T.AS.1337.AS.WWW.GULLI.COM
AMAZON.COM
To single out one record, look it up with "xxx", where xxx is one of the
of the records displayed above. If the records are the same, look them up
with "=xxx" to receive a full display for each record.
