In 10.7.2 update Apple roll out new bug, - hosts bug. This crashed broken hosts. I had tried install and configure dnsmasq, reconfig /etc/hosts/, and after this manipulations http://localhost/ doesn't load. If you need more info, please request it ))
My /etc/hosts file:
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
fe80::1%lo0 localhost
#
My /etc/resolv.conf file:
#
# Mac OS X Notice
#
# This file is not used by the host name and address resolution
# or the DNS query routing mechanisms used by most processes on
# this Mac OS X system.
#
# This file is automatically generated.
#
domain RT-G32
nameserver 8.8.8.8
ps sorry for a little broken english ^_^