Since tomorrow is the "World Launch Day" as professed by G...
World IPv6 Launch: What it Means for Content Owners & SEO - Search Engine Watch (#SEW)
Seems like the main concern is making sure your sites can be crawled properly and that you're not missing out on ipv6 traffic in the future as more users/devices, etc... are added. This will be a host/server-side issue, so asking them about if they're compliate or when they will be, may be a good idea. I'm going to talk to my network ops people on the various servers my sites are hosted on.
Any thoughts?