Just login to prometric and got to know I passed the 10g new feature exam (Beta). I am so happy as I never expect I could make it. It's my first time to take Beta exam and I only had 3 weeks to prepare it. To be frank, it's really a bad experience for me, the 3 hrs' test made me sick. I almost vomited at end of exam.
To be frank with you, I used almost the same resource as yours. I visited all the websites you mentioned. The only difference is I read the book 'Oracle Database 10g New Features: Oracle 10g Reference for Advanced Tuning and Administration' by Mike Ault,
Madhu Tumma, Daniel Liu. This is not an OCP book but I still used it as my main study resource due to no other choice.
I also downloaded some articles from metalink and oracle website to supplement my study, e.g. 'Top 20 New Features of 10g', '10G Storage New Features', etc. They are very short and didn't consume me much time. Some articles are useful, like 'Migrate from Non-ASM to ASM', I did encounter one question related to convert between
Non-ASM and ASM.
I remember there were quite a few quizzes of RMAN Backup & advisors. For diff kind of advisors, other than EM, you should also know its respective DBMS package names.
OCPWEB provides a good website, if you have time, you may want to browse it.