I am so impressed by gravitybone. Clever, funny, artful - and I'm not just saying this because Brendon's in this building. This is the sort of thing I wish our industry (and me specifically :) would produce.
I'll probably think of it every time I hear 'perfidia' (that and Wong Kar-wai) then play it again. It's worth your time (it's short and very friendly) and the hassle of fileplanet's download service.