Simply click on the top-left on Add Content.

Then click on "Create a Section" and add the right feed. For this blog:

 http://www.approximity.com/cgi-bin/blogtariAgile/index.rb/synopsis.rss

and for Futurometer:

 http://www.futurometer.com:3001/rss.xml

Now it will show up. Thanks to Ajax you can move the sections around with the mouse. Enjoy it!

Stefan added the red markings used inkscape an open source scalable vector graphics editor.