http://www. erikthered.com/flwm.html
This link has a handy chart.
Also, try looking for English recipes. They normally have their baked good recipes, measured out in grams...which I find for more precise things like bread to end up with a better more uniform product time after time.
I personally always do 4 ounces = 1 cup because that's what Alton Brown on Good Eats said.