If you would like to be notified, when a new posting is created, within a certain forum, you can subscribe to that forum. 

When a post is created in that forum, you will be sent an email, notifying you of that activity.

How?

1. Enter the forum, which you wish to subscribe to.
2. In the upper right of the forum (in the forum header), you will see a 'Forum Options' link
3. Click on that link
4. A drop down menu will appear
5. There will be a 'subscribe to forum' option, within that menu
6. Clicking on that option, will subscribe you to that forum

You can manage all your subscriptions, in your 'Control Panel' which is always available towards the top of the forum.