I passed 9i upgrade yesterday so I thought I'll give you a little feedback on it.
First off all, I'd like to take that oportunity to say thanks to everyone on DBA Support as I really like that site ( for certification as well as the Admin part) even if I have not got too much time to contribuate.
Special thanks to Tim for his notes on his site (http://www.oracle-base.com/Articles/9i/Articles9i.php)
Now concerning the exam :
I booked it - as usuall- by phone with Prometric. That time, the guy said the OTN20 discount code had expired. I had to pay full price.
I found the exam to be by far the easiest one (compare to the 8i exams). I still managed to fail on 3 questions