/. has been unavailable for me since 9am (EDT) when I first tried today. It looks like /. is located in a savvis datacenter.
$ dig slashdot.org
slashdot.org. 300 IN A 216.34.181.45
 
$ whois 216.34.181.45
Savvis SAVVIS (NET-216-32-0-0-1) 216.32.0.0 - 216.35.255.255
SourceForge, Inc. SAVV-S234813-8 (NET-216-34-181-0-1) 216.34.181.0 - 216.34.181.255