[faith:~] shanu% ping6 ipv6.google.com

That was easy. My Mac is now on the Freenet6 IPv6 backbone using the Gateway6 Open Source client. Am amazed that Google is already on IPv6 with http://ipv6.google.com/.

[faith:~] shanu% uname -a
Darwin faith.local 9.7.0 Darwin Kernel Version 9.7.0: Tue Mar 31 22:52:17 PDT 2009; root:xnu-1228.12.14~1/RELEASE_I386 i386
[faith:~] shanu%

[faith:~] shanu% ping6 -c 3 ipv6.google.com
PING6(56=40+8+8 bytes) 2001:5c0:1400:b::1c5f --> 2001:4860:c003::68
16 bytes from 2001:4860:c003::68, icmp_seq=0 hlim=51 time=491.952 ms
16 bytes from 2001:4860:c003::68, icmp_seq=1 hlim=51 time=470.914 ms
16 bytes from 2001:4860:c003::68, icmp_seq=2 hlim=51 time=558.184 ms