I don't know about RSS Feeds
<Sindatur scribbles down another tech he needs to Google and learn to understand
On the bf site, go to your account. Click on the "Subscribe to RSS" link, either towards the top/center, or on the right side of the screen (they do the same thing).
It will bring up a funny looking page with yellow background. Click the "subscribe" button. It'll ask you where you want to save the favorite. Choose your toolbar, call it BF or something simple.
Then, as long as you stay logged into BF, it will constantly stay updated with your latest available downloads. It'll know about them before you do!