I’m not one for too much buzz love, but I gotta give Buzz props for 2 things:

1) allowing me to comment on things directly in the ui that notified me of the new content (I suppose facebook does this with their new reply-to feature, but it seems icky)
2) allowing me to cc people directly in my comment and have it show up in their inbox

Both features I’ve apparently gotten used to and miss when I’m using software that doesn’t have them.