Does anyone know what app Harley is using to get the customized look?
...........
Not sure, but, they might not have used an application at all.
Another method for creating a custom FB look is via static FBML.
Here's a vid detailing the steps:
<http://www.youtube.com/watch?v=VNxE3REU_e4>
And more info...
<http://www.snipe.net/2009/06/fb-fanpages-fbml-box/>
.d.