Notifications.
 

Something that would Indeed be very usefull would be some sort of Notification system concerning the Forums.
Consider if a post is made in a thread you have created if you do not check it constantly you won't know. This does not make the experience very enjoyable having to sift through and remember exactly where you have posted especially if you have possibly lost your thread or another you have Posted in.

Any other suggestions concerning Notifications?

If you subscribe to the thread, you can easily see what threads have been replied to by clicking My Account. You can also set it to receive emails when your thread is replied to.