I would love a tab in the project view where I can see all the comments within that project.
There are times that I just want to keep up with the conversations and/or clear up any confusion that often surfaces in comments (but if I am not tagged I would never know).
Other times, I know I saw a comment related to a project I want to reply to later on (e.g. after finding an answer), but I cannot remember which task it was in and I cannot find it.