This book is now out (people who pre-ordered it from Amazon might have been notified the other day).

For those yet to buy it, Amazon currently have it priced at US$60 (still down from the RRP of $100), but have raised the weigh to 6.5 pounds, which will probably increase shipping to about $30 (it was about $25 when they had it listed as 5 pounds).

Hopefully it ends up being worth the hefty price and takes its place along side other "must have" books like the Vault and the original Generations.