I've added a very useful feature that allows you to add a topic to your favorites, so that you receive an email notification when somebody replies.
To do this, check the "Add this thread to my favorites" box at the bottom when you add a new topic or post a reply. You can also favorite a post by clicking the "Add this topic to your favourites" link in the blue box near the top of each thread.
If you want to be [b]automatically subscribed[/b] to every post or thread you make, just click on your name in the right sidebar and check the box under "Add my threads automatically to my favorites"
Now you don't have to keep coming back to check for replies.