That wasn’t your original reply last night, was it? It was something like, “many users find that scenario useful”.
Anyway, DT is the nearest thing I can think of to a Finder replacement, but maybe you want to scotch that idea as heresy?
But now in reading the forums more thoroughly I see that others have wished for that mirroring functionality
[url]Feature request: file system only type database]
Or is it “one step beyond”?