I would like to have similar editing possibilities with keyboard shortcuts in comments as in writing questions.
I find myself typing
Ctrl-B at the moment too often in the comment section.
Please, add keyboard shortcuts to comments.
Since this request is declined and Jeff is unlikely to be swayed by a bounty, I have written a GreaseMonkey script to add this functionality. I've added Ctrl+B and Ctrl+I support. I agree that it would be a good idea for this to be incorporated into the base code, but I guess it is not a high priority.