Thank you, Sagz.
Mojay:
It's not the most reliable of systems but clicking the 'Subscribe' button (hiding at the bottom of the box with the question in it) is meant to ensure that you receive an email every time the thread is updated. Otherwise, for fast changing threads, keep the thread open in a tab of its own and periodically press F5 to refresh the page. (If you're using Firefox you can get an extension which will automatically refresh pages at an interval of your own choosing)