I currently have a Jamis Ventura Sport; it's certainly light, and I use it for commuting. It can easily carry a load of groceries from the store, and I've used it for a couple short tours. While I'm currently looking at either a Nashbar steel touring frame or a LHT for more serious touring, the Jamis Ventura is a nice bike, and if light touring is what you're after, I'd recommend it. I don't have an actual weight, but right now with front and rear racks, lock, pump, and (empty) panniers, I can lift the whole thing clear over my head with one hand. (to get it into the back yard, I have to hoist it up over the garbage cans)