Re: "things break"
Internode was one of the first to offer IPv6 in Australia, and are (or used to be) a very geek friendly ISP. Letting you run servers from home on retail connections, etc. That's who I'm with, and IPv6 is working fine for me. And they are generous with it, I think I have enough IPv6 for every single molecule in my entire home. Well, maybe not those hard to reach ones under the 'fridge. The cockroaches living there will just have to put up with NAT, or move next door, it's smaller.