civic vx noise, cant figure it out what is it, help!

i have a 92 vx, it makes noises like that when cold and also when accelerating from first gear, or when cruising at 60 and accelerating just a little... sometimes just does it when i stand at the light... here is a link i found what i sounds like http://www.youtube.com/watch?v=CQwWAY7bogI&feature=related - kinda like grinding metal sound... any idea what that can be?

today i noticed it does noise when i accelerate from stopping point at around 1500-1700 rpm range .... my best bet is its something in transmission or some kind of bearing but dont even know where to look or what to replace, at this point just waiting till it breaks lol:)

first thing i would do is drain your tranny fluid and look for metal.. and how does the clutch feel? if good its probably not the throw out bearing, but could still be the pilot bearing. sounds like tranny bearings tho