One of the new JSF components introduced in Oracle JDeveloper 11g 184.108.40.206 is the Hierarchy Viewer (or HV for short).
Visually this is definitely one of the more impressive components in the ADF Faces set of components. It uses flash to render hierarchical relationships in a nice layout.
I played around with it for various demos I developed (including the 11g launch demo). While it is very easy to get started with it there are some tips to get exactly the look you want. I gathered a few tips on how to quickly build and customize your HV in this the following video tutorial
The basic thing to understand is that the component itself is a container component and you can play with the data you show in it by using the normal layout and common components available with ADF Faces. Also note that the default layout uses a lot of inline styles for fonts and fields - and you might want to change those as well.
Here is a basic 10 minute video tutorial on using the HV :
(Note - the video got cut while transferring it to YouTube - the part at the end would have shown you that you can access the cards through the structure pane and edit their content to show whatever you want, you can also add and remove cards).