i currently have a 94-97 specialized globe. great ride but its 35-40 lbs and doesn't do as well as i'd like on hills. i'm getting a bella ciao for my next which will be lighter but still upright. its supposed to be a great commuter.
the cool thing is they make them from ultra lightweight steel tubing - can't remember the exact type of tubing - but with a upright positioning, allowing one to have the best of both worlds.