Howtoforge posted a tutorial about integrating DropBox into the Thunar file manager on a Fedora 18 XFCE desktop
Thunar is the default file manager for XFCE desktops. While it is easy to integrate DropBox into Nautilus, the default file manager for GNOME, it is not so trivial for Thunar. This guide explains how to use DropBox with the Thunar file manager on a Fedora 18 XFCE desktop.How To Integrate DropBox Into Thunar (Fedora 18/XFCE)