During a discussion on the NANOG list this week, I came up with an idea that would allow content providers to test their IPv6-ability ie. what would happen if they turned on AAAA records for their websites, which is currently a big reason that content providers aren't "6-ing up". The general idea is to do GETs to several different URLs on different hostnames, and have the different hostnames have IPv4-only, IPv6-only and IPv4+IPv6, and then report the stats. After some playing+testing, I've come up with some code, and it's available here: http://www.braintrust.co.nz/ipv6wwwtest/ I'm not really a JavaScript hacker so it probably isn't terribly amazing quality, but it seems to work OK for me - I've been running it on several of my websites with a large range of user clue+access+OS +browser+ISP as visitors and I've had no complaints. The code is running on the page above, too. Also, the default timeout in the tarball is too high, 10000-20000 is probably adequate. Please let me know if you use it, or if you do something similar or use it for inspiration or whatever. In addition, I'm sure we'd all love to see any statistics you can share when using this. Enjoy! -- Nathan Ward