I don't mean to step on any toes, but I just wanted to point out (while it's not quite the same) to users who are missing notifications that there's this page that people can check to ee what comments they've received, as well as those they've made.
I would much rather see a more comprehensive navigational bar (although I do appreciate the simple scheme and would prefer it not get too fancy) than have you take on too much for additional features that hadn't been working properly at GJ for quite some time anyway. Maybe somewhere along the line it could be implemented, as I know that insanejournal.com is planning on incorporating a notifications system and they've been around for years.
