In case you haven't heard about the new OpenSolaris book yet - the name is "OpenSolaris bible" and has been written by Nicholas A. Solter, Jerry Jelinek and David Miner. The book is not available yet, however you can already pre-order it and it is supposed to be available pretty soon. You can read more about the book in the blogs of individual authors: Announcing the OpenSolaris Bible, Writing the OpenSolaris Bible and The Good(?) Book.
I found today the sample chapter from the book, so if you want to "get a taste" of the book you can download the first chapter here. I just can't wait to get the book into my hands! :)
Btw, another OpenSolaris book is also on the horizon - Pro OpenSolaris from Apress.