One feature that I would find very useful is the ability to display on a single page the entire Topic. So maybe the ability to have a page that displayed:
1) Topic Properties
2) Topic Comments (Maybe no need for the Topic Text?)
3) Topic Information
(Maybe an option to say exactly what you want displayed on the page)
The reason behind this is that it would make it easy to then save off the complete Record of the code review and store it in a Document Management system (Print as PDF for example).