That must be nice, I still use a Wild Things Andinista which comes in just under 4 pounds.
Right now I needed an all around warm sleeping bag so I went with a Western Mountaineering Versalite at 2 pounds 2 ounces but that will probably be my next major move to cut weight is buy a cuben fiber quilt that is around 11 ounces.
I'd be doing well with pack weight if 7 pounds of camera gear hadn't become mandatory!