Ha! Just came across this thread when eyeballing the updated FAQ...
I can already tell I'll be using some WD-40. I have 5 other sounds that I have located as far as where they're coming from, but as-yet cured:
1) The red clip parts of the front seatbelt receivers - they rattle and squeak a bit. When I hold the red clip part in place, it stops.
2) Squeak coming from front left dash vent/speaker grille. Likely loose from when I had new speakers installed - I shall tighten and if that doesn't do it, try to cut some thin strips of foam to cushion.
3) Squeak from lower dash console area - just to the right of the ashtray - when I hold it while driving, it goes away. Maybe can shim it with something, to tighten the fit.
4) Stumper: a swinging thunk coming from the right (US passenger side) front corner - as though there is something suspended inside the fender that swings about and when I corner/turn, it thunks against the inside of the fender. What I suspect, is: I replaced my front turn/cornering lights with clear ones; the replacements did not have the receptable for the front reverse lights, so I left the socket dangling. The driver's side doesn't do the same but I know the configuration is slightly different.
5) Stumper: the sound of something rolling to and fro right behind me - like it's under the back seat window. I hear it "bump" when I accelerate, and bump back again when I brake. It is quiet, not loud. As though I had something rolling around under the trunk floor, but it's much closer - like just behind me and to the left.
I'll enlist someone to ride with me and try to place an ear / hand to find the exact source of some of these - it's tough to pin-point and drive at the same time!
Oh - and for new owners, that sloshing sound? Drove me nuts until someone pointed out the drains along the lower edge of the sidebody - they had all become clogged with twig bits etc - a thin screwdriver shoved in and twisted a little clears them out.