Being late to the party

• Not so bad if

• WWW Content provider – for most of the foreseable future IPv4 sites will be visible by IPv6 only hosts via proxies and service provider NAT

• Bad if

• Sysadmin – you do NOT want to do a transition over a weekend
• Have distributed NAT unfriendly services like VOIP phones on commodity tails
• Can not get IPv4 addresses