on 7 December 2010
I've just passed the 70-643 exam (Dec '10) based on studying this book, my own experience and pure luck. However be warned that the exam is based on Windows 2008 R2 and Sharepoint Foundation 2010 and not Windows 2008 and Sharepoint v3.0 as covered in the book. There are some differences between Win 2008 and Win 2008 R2 particularly now Terminal Services has become Remote Desktop Services. There is the usual quantity of errors and mistakes in the book that you normally find in these Microsoft Press books but nothing that really detracts from the usefulness of the guide. During the exam I constantly felt that the book had only skimmed the surface detail of the key topics which was quite frustrating and lead to some guesswork with the answers.
Overall a useful guide but don't expect the book to hand you an exam pass; you really have to practise with the technologies more than just doing the basic exercises in the book if you don't want to get a nasty surprise in the exam.