That's good info. I think those 'official' PMP trainers/programs have an inside track on current test material. IMHO, just studying the PMBOK isn't enough.
I took and passed the test in 2006. I have kept up with the professional development units just to keep the cert. The mulcahy book I used was valuable because there are a lot of scenarios with answers in the book, just like the test. The pmbok was almost useless because it's more of a reference book, it's hard to read. I don't use pmp stuff much, just another hoop I had to jump through.