Well didn't know we have comments?
We always did.
Where is it?
Go to someone profile and there's a tab that says comments.
Can't comment on someones profile? They haven't allowed it yet.
How to allow it?
Click Profile then the tab Preferences then you'll see "Allow visitor messages on my profile :" You choose the setting you want.
How will you know if you get a new comment? You'll get a new PM saying that you have gotten a new comment.
-Enjoy