If you're using the extension Locationbar², you might want this: It makes the location bar hover effect work a little more similarly to Windows Vista/7 style. It's not perfect, but it's a start! Easy to modify to your theme if you want.

Change Log:
* March 14, 2009: Background picture is not not on imageshack and loaded from URI, therefore doesn't need bandwidth.
* March 10, 2009: Fixed cursor effect.