Facebook puts a little (1)
in the page title whenever you have a comment, etc. I find this really handy when I have a bunch of tabs open, and it would be great on Stack Overflow too. So, could we get the development team to add this in?
To clarify, when a notification or comment is received and shown as a number in a red/blue circle next to the Stack Exchange logo in the top bar, I think it would be a good idea to mirror that number in the page title, similar to the way Facebook does.
(x)
in the tab, but I can't actually find out now since there isn't much activity.