For those of you who don't use Firefox, or who simply prefer bookmarklets, you can drag the following button to your bookmarks toolbar.

1 - Install the bookmarklet

Netvibes Bookmarklet

(drag and drop this button to your bookmark toolbar)

2 - Extension Usage

Extension Usage

Once you are on a page you like, click the bookmarklet and it will open a new window where you'll be able to preview the site's feed (if it has one), and add it to your Netvibes page.