There was a thread a while back discussing how much clamping pressure was required on glue-ups. I believe the "just finger tight" crowd was the majority.

The Dec issue of FWW has an article that might change that method. It seems that most woodworkers use too little clamp pressure. The author puts some science into the equasion, recommending various clamping pressures for various wood species.

The most interesting thing to me was the illustration showing how the pressure radiates at a 45 degree angle from the clamp, thus dictating how many clamps are necessary on a given glue-up. I've always just kinda guessed at that...now I know.