I recently wrote a chapter in the new eBook "Introducing SQL Server 2008" at MSPress. Peter DeBetta was the main author and Mark Whitehorn also wrote. It’s now available: http://csna01.libredigital.com/?urss1q2we6
And it’s free !
(PS: I've had a few people ask how you read it. It downloads with a cfm file extension for some bizarre reason. It is a pdf. Just rename it to be one and you should be fine).