There is Comments section at the bottom of each page where you can make comments, corrections, add info, etc.
I've passed the exam, so I won't be updating the site much. I will improve the presentation a little. If anyone wants to help edit it, you are most welcome. You'll need to sign up for a free wikidot account, and then I can arrange membership to the wiki.
Let me know if you have any suggestions. Good luck!
The discipline used to write things down is the first step in making them a reality.