If you preordered the SAMS book on Amazon.com, you may have received an email from them over the weekend advising they are not able to ship the item yet, and estimated a new delivery date of 05/13/2008 – 06/20/2008.
This is an automatically generated email, and the date provided was not based on information from the publisher. As soon as the "in-stock" date is missed, Amazon automatically adds 90 days or so to the expected time and emails everyone who has pre-ordered.
SAMS has advised that the warehouse in stock date is 3/12/2008, at which point the books will begin to be distributed to the bookstores and online sites such as Amazon. It probably will take a week or so for it to be received throughout the channel, but the book will be available in March, not somewhere between mid-May and mid-June!
3/21/08 – an update on this. Amazon now shows that the book is In Stock. Happy reading!