gnome 3: how to add "Desktop", "Documents", "Downloads" etc to favorites?

[Christian Resnik <cresnik ee ethz ch>]

Hi all

I'm giving Gnome 3 on Fedora 15 Beta a spin at the moment and I can't 
figure out how to add Desktop, Documents, Downloads or any other 
pre-configured folder to the Favorites (Activities).
The only folder I can add is Files which is then displayed in Nautilus 
as "Home".

Can somebody give me a hint?

Thanks & best regards
Chris