Currently in the front page, if a question is modified, answered, commented etc. the last user to affect the question appears:
Which is great.
The problem is when I want to know what that user did.
For instance, for very popular questions I know it will be the last answer in page ... 16 etc.
For comments or edits I copy the user name ( ctr+c ) click on the question, and then ctrl+f to find them.
I think it would be nice if I can have a link to what that user did on that question to see it directly. I guess a link in the "time" would do, just like in the editing history.
I have just realized this functionality is half done in the "Recent" tab in the user profile which actually has the "link to recent activity" functionality already.