Kathryn, I agree that someone shouldn't see a post saying "40#'s" and try to lift that amount the next day if they're currently using 12#, however, I do think finding out what others lift can help with motivation and setting goals. I was using 5 or 8 lb db for front delts until another forum user stated that she uses 20 or 15# db for front delts. Well, I upped my shoulder training, took it slow but steady, and can now bang out 3 sets of 12 reps with 12# db. I don't think I would have pushed myself had it not been for the information this other Catheite shared. Sometimes it can be very intimidating or almost depressing to hear what others lift, but heavier weight loads are almost always the result of years of training that way. I just have to remind myself that even women like Cory Everson or Monica Brandt had to start somewhere. Okay, my high horse is put away now, sorry.
Here are my current weight selections (all weights are for dumbbells unless noted and all poundages used are for strength training workouts, not endurance type workouts):
Shoulders: 15# dumbbells for rear delts, 12 for front and side, 15 for oh presses
Tris: 20 or 25 for close grip db presses, 12 or 15 for lying extensions, 12 for kickbacks, (1) 25 or 20# db for french presses
Bis: 20 for hammers, 20 or 15 for standard curls (I usually *try* to do the first set of standard curls with 20 and then drop to 15 for the next set), 15 for concentration curls
Back: 25 for one arm rows, 50-60# bb for back rows (sometimes my forearms burn out and I have to lighten the load), (1) 30# db for pullovers
Chest: 25 for bench press and 20 for flies
Legs: 40-70# bb. When I do PLB, I do the squat, lunge, and plie pyramids like this: 55-60-65-60-55, for leg press it's 35-40-45-40-35, and for dead lifts, it's 40-45-50-45-40. When I do S&H legs I use 65 or 70# (if I can lift it onto my shoulders that day), but when I do Power Hour or Leaner Legs, I use 40#.
Lately, I've been using lighter weight loads because I was getting burned out with lifting heavy (or what was heavy for me) and because the Body Blast series includes so many interesting non-weighted moves (like the inverted shoulder presses, or the see saw tricep pushups). Hopefully I won't lose too many strength gains, but variety is the spice of life.