It's possible to be informed of new topics or posts in the forum.

Firt method : to receive emails notifications
Go to a Forum and on bottom of page click on the link "Subscribe to this forum".
You will then be notified on any new post.

Second method : subscribe to RSS Flow
On bottom of forums index page, right click on "RSS active topics feed" and copy the link address,
or on bottom of any forum page, right click on "RSS forum feed" and copy the link address.
Then go to any RSS reader (Outlook, Google reader, ...), create a new RSS subscription and paste the copied link to the requested url. You will then recieve new feed of any or the selected forum.