I felt the same way too when I first came across RSS.
Basically, this is what's called "PULL" technology, where you decide what content you want on your page. So for example, if you use My Yahoo, you could put a little column on your home page and 'pull' this forum's content there, so you see that plus any other stuff you want from the web, all on your home page. It's like being able to customize your daily newspaper.
So instead of visiting the forum, like you say, you would make the forum come to you.
We are actually working on an RSS-based product (not related to brillbaby/brillkids), but that's all I can tell you for now otherwise I'd have to kill you...
KL