Quicksilver Cube interface - "beautiful" doesn't do justice
I'm not sure if this interface is only available to the Quicksilver developer build versions or not, as I am running the same version he is. If this is the case and you're still eager to take the plunge though, you can enable and access this version from Quicksilver's Application preference tab. However, if you're just getting used to this app or prefer stability over new features and eye candy like this, I'd recommend waiting until the Quicksilver crew brings this more mainstream.