Amazon.com just posted my five-star review of IPv6 Network Administration. Wow, this was a great book. I've added it to my Telecommunications recommended reading list. From the review:
"IPv6 Network Administration is an absolutely first-rate technical guide. It is refreshing to read a book that doesn't waste time by assuming the reader has no networking background. IPv6 Network Administration achieves just the right balance between history, theory, and practical application to serve the needs of administrators and interested readers. If you've been waiting for the right resource from which to learn IPv6, this book is it."
The authors maintain a blog to infrequently post IPv6 issues. I plan to give 6to4 a try. The authors discuss 6PE, which I'd like to understand better. They also mention SEcure Neighbor Discovery (SEND) to mitigate link-layer attacks.