Techblog

Anyone who knows me personally knows how serious I take the IPv6 change over. Here is a counter I found that shows the exhaustion to occur in Sept 2011.
http://inetcore.com/project/ipv4ec/index_en.html

Here are some other tools they have offered:

1) IPv4/IPv6 Address checker:
http://inetcore.com/project/46checker/index.html.en

2) Internet Metrics:
http://inetcore.com/project/metrics/index.html.en

3) IPv4/IPv6 Meter: (I will be adding this here as soon as I setup IPv6 here)
http://inetcore.com/project/46meter/index.html.en