Turly's brought out a universal version of the venerable FinderPop, now a preference pane. I found with earlier builds of the OS X version of FinderPop that I wasn't using it nearly as much as I did under OS 9, due in large part to my use of Quicksilver. However, I can still find a use for FinderPop in my workflow, and I encourage you to give it a go and see if it has a place in your workflow, too.