After fixing some of the broken features of Scirate.com I decided that it was time that I added a comment feature per paper to the website. So, yep, now you can comment away on any paper you want that is listed on Scirate.com. Note that you have to be registered to comment. Of course any comments you have about the comment function being broken is welcome. The recommendation system should also be up and running fully again and hopefully has also been speeded up by some rearrangements I just performed.
O brave new quantum world!