For those that are skeptical, check the nameservers:
http://network-tools.com/default.asp?prog=dnsrec&host=po...
http://network-tools.com/default.asp?prog=dnsrec&host=fu...
http://network-tools.com/default.asp?prog=dnsrec&host=ub...
All of the domains point to nameservers at cirfu.net, which appears to be the FBI's Cyber Initiative and Resource Fusion Unit (http://itlaw.wikia.com/wiki/Cyber_Initiative_and_Resource_Fu...)
What's more interesting (to me): the domains don't appear to have been using US domain registrars.