I just bought a new pair of 2010 One bindings, and they are great! I went to the store 100% planning to purchase the CWB AA bindings, but the guy at the shop strongly suggested first that I try on the Ones. I did it just to get him to leave me alone, but sure enough, they felt good even before heat molding. But I still thought I knew better, so the guy patiently waited while I insisted on trying on many different pairs of CWB and LF bindings for the next 30 minutes. None of the CWB or LF bindings could even come close to the comfort of the Ones. Turns out the shop clerk had been right the whole time, so I wound up buying the Ones. After heat molding, they are pretty amazing. I've ridden a few sets behind a Supra Gravity Games edition with plenty of boost, and the performance of the bindings is good. It is a little weird for me to get accustomed to the idea of wake bindings that don't release, and also I had to make peace with the idea of dropping 4 bills on bindings, since I've been out of the game for a little while. But in the end, I'm happy with my purchase and would buy the same again. I wish the plate was a bit stiffer, but I guess you can't have everything.
Oh, and they are indeed very light, so like Jeremy wrote, not sure how you would make bindings much lighter.