I love these additions.

One pet peeve, though. I think it's a bad idea to -- visually at least -- create two ways of bookmarking things.

Bookmarking of comments using the icon is fine. The "Bookmark" link to bookmark icons feels wrong somehow. What if you were to move this next to the article "like"-icon? And then use comment bookmark icon for articles as well.

View this comment - View article - View full comments