I took the exam 3 weeks ago and I'm waiting for results.
I took
SANS MGT414.
There are free practice quizzes available at
http://booksite.syngress.com/companion/conrad/practice_exams.php and
http://www.cccure.org
The Messageboard at cccure.org is also pretty good for getting answers to things that you might be confused with.
The CBK domains were updated recently (January I think?), so the vast majority of books available today are not updated for the new exam. That being said, probably 95%+ of the content is still good. Shon Harris' CISSP All In One is recommended by pretty much everyone. The CISSP Study Guide by Eric Conrad, Seth Misenar, and Joshua Feldman, and the Eleventh Hour CISSP Study Guide by Eric Conrad was also recommended to me. I didn't read any of those...but Eric Conrad was my instructor for SANS MGT414, and several years back I took SANS SEC401 with Seth Misenar as the instructor. They are both extremely knowledgeable and talented instructors...and I'm sure the books they have authored are equally as good.
I'm anxious to get my results back. I was already familiar with probably about 50% of the CBK content, so I definitely didn't prepare as much as someone coming in cold would need to.
Also, Ted Demopoulus (another SANS instructor) has a nice PDF of CISSP Acronyms and their definitions if you sign up for his mailing list at
http://www.securitycerts.org/review/cissp-acronyms.htm. It's probably around 30 pages (printed 1 side), and it could be a good study aid.