I'm a little behind on this one....but after many, many
months, the Solaris 10 System Administration Essentials
book is available for purchase. It covers all aspects of Solaris 10, from features you'd expect like ZFS, DTrace, FMA, and Zones as well as packaging & patching, user & network administration, and filesystems.
I had the distinct honor of authoring the Fault Management chapter. A little over a year ago, followers of this blog got a taste of that chapter in the Managing Fault Management Log Files.
12/11/2009 Update: The text is live on Safari Books now.