I've just rolled mine onto the shipping scale at work. It's accurate, but not precise, in that it rounds up to the next whole pound and doesn't show decimal places. Apparently, that's how shipping companies bill, so that's how its measured. So, if a bike is 22.2 pounds, the scale says 23.
So, first, my '72 Raleigh.
30 pounds with the saddle bag, alumimum fenders (installed after the photo was taken), tools, pump, lights, and a u-lock mounted.
My Surly Disc Trucker:
36 pounds as shown, but with the Topeak trunk bag removed (and an empty bottle).
This is the lightest cruiser I have - A Schwinn Classic Al3:
35 pounds, with a lighter saddle on it. I replaced the springer saddle with a Brooks look-alike shorly after taking this. It has an aluminum frame, aluminum bars, stem, and wheels. Makes me wonder how other folks are getting steel-framed cruisers with more stuff on them down into the mid-30s range...