Being a relative newcomer to BPL and to UL concepts, I am in the process of honing down my kit.
Thanks to inspiration received here and to relentless pressure from the anti-groundsheet guys elsewhere, I did a little more shaving and have managed to cut a significant amount of weight.
Eliminating ground cloth and stuff sacks: -5.9 oz
Stove storage sleeve, stock to MYOG tyvek: -0.7 oz
Trekking poles, removing baskets and straps: -2.4 oz
Side compression cords on pack, not used: -0.32 oz
GPS, Etrex 30: -5.3 oz
Tripod, Zipshot mini vs zipshot: -2.0 oz
And a few other things, such as using lighter ziploc sandwich bags vs heavier freezer bags, where appropriate, Bic mini vs Bic, etc.
The biggest decision was whether to remove the straps from the trekking poles. On the last couple of trips I made it a point to not use the straps and to pay attention to when I was really using the poles and found that they were a genuine benefit to me only on moderate uphills, and that they actually slowed me down when using them on slight up/downhill and flats, and especially on steep uphill/downhill. In those "scrambling" situations with steep uphill and downhill, it was safer and faster for me just to concentrate on foot placement and not to have to worry about pole placement as well.
The side compression cords on the pack were not a huge deal, but I figure that if I haven't found them at all useful after a few trips, clearly I can live without them. I removed the bottom straps after the first trip because I have never, ever liked strapping things there.
The GPS is not needed when I have maps and am in a well-traveled area, which I am most of the time lately. I only carried it for the track logs to get accurate distance and vertical information, which really isn't necessary. HOWEVER, this was offset by the 4.4oz addition of a SPOT3 to keep my wife informed of my whereabouts and maintain peace of mind for her when there is no cellphone signal, and for that it is a very worthwhile trade-off.
So I guess I am not SUL yet, but definitely getting on the lower end of UL after the latest "haircut", sub 7lbs base weight. I will know for sure when I pack tomorrow for a 2-night trip.