I'm not a big fan of New Year's resolutions (they always seem like a convenient way to procrastinate), but I have one for next year. Beginning January 1, 2011, I'm going to write blog articles using only IPv6 addressing in labs, where practical.
Since starting the blog nearly three years ago, I've tended to use IPv6 addressing in technical examples only when the topic being discussed dealt specifically with IPv6. No more. The last few remaining blocks of global IPv4 address space will be exhausted next year, and there is simply no excuse to avoid using IPv6 in documentation and examples.
Unfortunately, achieving parity with IPv4 for many features remains a struggle. There are still many cases where technologies simply don't work on IPv6 due to buggy or nonexistent implementation. IPv4 will still have to be used in these cases (for now), but I will make every effort to utilize IPv6 where possible.
For those of you still perhaps not quite comfortable with IPv6 yet, there are plenty of resources out there. This blog has an entire category dedicated to IPv6 articles, plus there's the IPv6 cheat sheet. There are a plethora of books on IPv6 and specific implementations available. I also suggest reading the core IPv6 RFC, RFC 2460 (it's not as scary as it sounds). Finally, the documentation from Cisco and other vendors should provide plenty of background information on specific platforms.