Started my my car this morning and heard a dreadful sqeaking sound comming from the engine bay

Sounds like its comming from the cam belt or power-steering/alternator belt.
The noise continues when driving, but its less pronounced whilst accelerating.
Any ideas on what may be causing this? The cam belt was replaced 10,xxx ks ago, so i doubt its that, but i have had a problem with the power steering belt before (an old lead id left hanging dropped down and flicked the belt right off).
1988 r31 TI Skyline.
1982 ra60 Celica (my Aussie Toyota and axle stand warrior).
ex: 1991 Corolla, 1989 fxgt-v, 1985 aw11. 1992 sw20 gt-s. 2002 glxi Lancer wagon (work hack)
next car - another a-dub please!