I have exactly this same problem. I checked my hosts file, which reads:
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
fe80::1%lo0 localhost
Using the Network utility, a ping to www.google.com returns the following results:
Ping has started…
PING www.l.google.com (74.125.73.106): 56 data bytes
64 bytes from 74.125.73.106: icmp_seq=0 ttl=54 time=63.801 ms
64 bytes from 74.125.73.106: icmp_seq=1 ttl=54 time=60.193 ms
64 bytes from 74.125.73.106: icmp_seq=2 ttl=54 time=64.545 ms
64 bytes from 74.125.73.106: icmp_seq=3 ttl=54 time=58.229 ms
64 bytes from 74.125.73.106: icmp_seq=4 ttl=54 time=58.510 ms
64 bytes from 74.125.73.106: icmp_seq=5 ttl=54 time=58.276 ms
64 bytes from 74.125.73.106: icmp_seq=6 ttl=54 time=59.600 ms
64 bytes from 74.125.73.106: icmp_seq=7 ttl=54 time=101.432 ms
64 bytes from 74.125.73.106: icmp_seq=8 ttl=54 time=57.711 ms
64 bytes from 74.125.73.106: icmp_seq=9 ttl=54 time=57.481 ms
--- www.l.google.com ping statistics ---
10 packets transmitted, 10 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 57.481/63.978/101.432/12.703 ms
Using the Network utility, a lookup to www.google.com returns the following results:
Lookup has started…
; <<>> DiG 9.6.0-APPLE-P2 <<>> www.google.com +multiline +nocomments +nocmd +noquestion +nostats +search
;; global options: +cmd
www.google.com. 896 IN CNAME www.l.google.com.
www.l.google.com. 18 IN A 74.125.73.105
www.l.google.com. 18 IN A 74.125.73.106
www.l.google.com. 18 IN A 74.125.73.147
www.l.google.com. 18 IN A 74.125.73.99
www.l.google.com. 18 IN A 74.125.73.103
www.l.google.com. 18 IN A 74.125.73.104
google.com. 535 IN NS ns2.google.com.
google.com. 535 IN NS ns1.google.com.
google.com. 535 IN NS ns4.google.com.
google.com. 535 IN NS ns3.google.com.
ns1.google.com. 358 IN A 216.239.32.10
ns2.google.com. 444 IN A 216.239.34.10
ns3.google.com. 375 IN A 216.239.36.10
ns4.google.com. 358 IN A 216.239.38.10
I can access other google pages, such as maps, but not the main www.google.com website. My iphone calls up this page on my home wireless network with no problem. This problem did not occur at all until I used mac update two days ago.